TEXT: “I Want You to Kill the Ice Cream Man”©1998
  By Michael C. LaBossiere
  Ontologist@aol.com
  Call of Cthulhu
  Legal Information
  This adventure is copyright 1998 by Dr. Michael C. LaBossiere. It may be freely
  distributed for personal use provided that it is not modified and no fee above the
  normal cost of distribution is charged for it. Visit my web site at
  www.opifex.cnchost.com.
  Call of Cthulhu is Chaosium Inc's registered trademark for their game of horror and
  wonder in the worlds of HP Lovecraft. For more information, contact Chaosium
  Inc., 900 Murmansk Street  Suite 5  Oakland, CA  94607.. Visit Chaosium's
  web page at www.chaosium.com/cthulhu/.
  Introduction
  This adventure must take place in the summer in a place where there are ice
  cream trucks. Virtually any American town or city will do. The adventure is set in
  the 1990s, but could be modified to fit in other time periods.
  While most ice cream trucks bring joy to thousands of children, one brings
  horrible death to them and grief to their parents. It is up to the investigators to find
  and kill a hideous creature. A creature that dresses in the flesh of dead ice cream
  men. A creature that feeds on children. A creature that must be stopped.
  This adventure is fairly short, but might be a bit disturbing to some people.
  Getting the Investigator’s Involved
  On a pleasant summer evening, some of the investigators will be enjoying a meal
  at a small restaurant. They will be seated in the outdoors section. One of the
  investigators will notice that a man keeps going past the restaurant and returning,
  all the while casting furtive glances at the investigators. The man is dressed in a suit
  that was once obviously very nice and expensive, but is now tattered, worn and
  stained. The same is true of his shoes and brief case. Finally, the man will appear to
  steel himself and will go up to the investigators and sit down.
  He will say the following: “Most of what I say will seem mad. But I am not mad.
  Please listen to me. If you don’t believe me, I’ll just get up and leave. I won’t try to
  hurt you or anyone else.”
  If the investigators tell him to leave, he will do so. A few minutes later, the
  investigators will see two police officers chase after him and take him away. They
  will latter learn he has been charged with shooting an ice cream man. He will admit
  his guilt, rant about the monster and be institutionalized. Eventually, he will
  commit suicide.
  If the investigators are willing to listen, he will tell the following story:
  
  Four years ago I was a successful researcher for a law firm. I was divorced, but
  I had joint custody of my son and he was spending the summer with me.
  That summer seemed so great...I bought him ice cream...I bought him ice
  cream from the truck...One night, something woke me up and, for some
  reason, I felt the need to check on David. He was gone, so I went looking for
  him. I happened to look out the window and I saw him walking down the
  sidewalk towards the ice cream truck...I ran out of the house, yelling to him.
  He seemed to be ins some sort of trance and just kept on walking towards the
  truck. I saw the ice cream man get out of the truck. He looked like a young
  man, blonde and smiling...but there was something wrong...a smell...or
  something. I ran to grab David...when I reached him, I felt the ice cream
  man’s hands fall on my shoulders, pulling me up...I looked straight into his
  dead black eyes...then nothing. I woke up the next morning, laying on my
  bedroom floor, wondering what had happened. I almost forgot...I didn’t
  remember what happened that night, not until after the therapy. I went to
  check on my son, but he was gone. My wife thought I had taken him
  somewhere and the police got involved. That’s when I had the therapy...that’s
  when I remembered.
  If the investigators still seem willing to listen, he will continue:
  I don’t have much time, so here are the important things. After I
  remembered, I went looking for the ice cream man. He was gone without a
  trace. So I went looking for him and his truck. I searched and searched,
  finding traces. All my research is here, in this brief case. I don’t have much
  time...they’ll be here soon...but I learned that he goes to a town and sells his
  truck. Then he steals the buyer’s body and starts selling ice cream. Then he
  starts taking children. Not many...just one or two a month...not enough to
  attract attention. I researched everything carefully...I was in research you
  know...I have photos from the towns, missing child reports, eyewitness
  reports and statistics. I showed it all to the police but they couldn’t see it. They
  were polite and were interested, but I made the mistake of saying that it was
  one person in every case...then I said something about a monster...sometimes
  I say things I shouldn’t... 
  He will look around and see two police officers walking across the street. He will
  look nervous and slide his brief case under the table. He will then say:
  Here they come...it is time to pay for my mistake. I tracked it to this town but I
  acted too soon. I went up to the ice cream man and shot him. He just dropped
  to his knees, blood staining the white...a look of dumb shock on his face...not
  the monster at all...you have to stop him. I want you to kill the Ice Cream
  Man...
  The man, Larry Helmsworth, will get up and run toward the police, yelling “here I
  am!” The police will grab him and take him away. What the players do next is up to
  
  them.
  Keeper’s Background
  The creature Helmsworth is talking about really does exist.  Four years ago it came
  to his town and took his son, along with some other children. It has been preying on
  children, in one guise or another, for untold centuries.
  While the creature has used many disguises in the past, it currently is posing as an
  ice cream man. To disguise its true appearance, the creature steals the skin of a
  person and wears it like a suit. The creature has been operating in the following
  manner: it will drive the truck to a town and put it up for sale. After it sells the
  truck to a suitable person, it will wait for the new owner to get all the licenses and
  such for the truck to operate. After the person establishes a route, the creature will
  kill him, skin him and then wear the skin as a disguise. The creature will then select
  a few suitable victims and sell them some “special” treats. After the creature has fed
  on at least two victims, it will decide to move on (also, it’s disguise will be getting a
  bit decayed by that point). It will drive to another town and start the process all over
  again.
  Helmsworth managed to find the creature and track it to the current town. Three
  days ago he shot the person driving the truck. Unfortunately, the person driving the
  truck was not the creature, but the person intended to be the creature’s next victim. 
  Horrified, but knowing only he knew the truth, Helmsworth fled the scene and
  went looking for help. Because of his skill in research and his obsession with the
  creature, he was able to learn a great deal about the unusual aspects of the world,
  including the identity of at least one of the investigators. Thinking he might be able
  to convince the investigator, Helmsworth found out where he was and went there
  with his evidence. Helmsworth knew the police were after him, but he figured he
  would have just enough time to talk to the investigators.
  While Helmsworth is talking to the investigators, the creature will be waiting to
  get its truck back. It will tell the police that it had not been fully paid for yet (which is
  true). Three days after the shooting, the creature will have its truck back and be back
  in business.
  Investigation
  There is a variety of information the investigators might be able to acquire.
  Helmsworth’s Brief Case
  Most of the investigation has been done for the investigators by Helmsworth. His
  briefcase contains many photos of the truck, different drivers, as well as children
  buying ice cream from the truck. For many of the photos of the children, he has a
  corresponding “missing child” picture. He also has a list of children who went
  missing in each town when the ice cream truck was there. Finally, he has a list of ice
  cream truck owners/operators who went missing in the same towns. 
  If the investigators check the information themselves, it will all check out. All the
  people who are listed as missing are really missing. If the investigators know about
  missing person statistics (or talk to someone who does) and checks the information,
  
  they will learn that the places listed in Helmsworth’s data do not have missing rates
  that differ significantly from those of similar places. If the investigators take the
  time to do some research on the matter or hire or ask an expert, they will learn that
  all of Helmsworth’s data could be explained entirely in terms of chance. In other
  words, if a person just went around taking photos and making lists of missing
  people in various places, the results could be similar. Because of this and the fact
  that Helmsworth seemed a bit unstable caused the police to not accept his story.
  If the investigators decide to try to dig deeper, they will not be able to turn up any
  new information. No one else suspects that some creature is involved and people
  with missing children will become outraged if someone comes to them talking
  about monsters. If the investigators are too persistent in investigating the matter,
  the police might connect them with Helmsworth and bring them in for questioning.
  The Victim
  If the investigators check on the person who was killed, they will be able to learn
  that he was Jeffrey Kelly. According to the newspapers, Kelly had no immediate
  family in the area (which is why the creature picked him) and it was his first day
  selling ice cream. Part of the story is as follows:
  Senseless Killing
  The merry bells of a ice cream truck bring joy to the hearts of the children, but
  today one set of bells fell silent. Jeffrey Kelly set out this morning in his ice cream
  truck to begin what he hoped would be a fun and profitable career. Sadly, tragedy
  struck. As Jeffrey was handing out frozen treats to the eager children, an
  unidentified man leaped out of a car and ran up to Mr. Kelly. According to
  eyewitnesses, the man calmly fired three shots from a small pistol into Mr. Kelly,
  then said “I got it wrong” and fled the scene on foot. Police are still looking for the
  gunman.
  If the investigators decide to dig deeper and get access to some official sources of
  information, they might be able to learn that Kelly bought his truck from a Mr.
  Hugh Jones. If they check up on Mr. Jones, they will find the address given for Jones
  actually is the residence of an older couple, who have nothing to do with the
  creature. They might also learn that Hugh Jones reclaimed his truck after he was
  able to prove that Kelly had only made one payment on the vehicle. 
  Helmsworth
  If the investigators try to contact Helmsworth, they will learn that he is in police
  custody and will be undergoing psychiatric evaluation. An investigator with legal or
  psychiatric credentials might be able to talk to him. Helmsworth will, unfortunately,
  have little else to add. He is consumed with guilt and is just waiting to die so he can
  “join his son in heaven...”.
  The Ice Cream Truck
  The investigators will probably want to investigate the truck. As mentioned above,
  the truck was turned over to a Hugh Jones. After getting his truck back, the creature
  
  had to take another victim to replace its decaying skin. It then sold the truck to
  another person. The person will take only a few days to get the truck going, since he
  already owns a small ice cream truck business. If the investigators ask about the
  truck, he will say it was sold to him by a Mr. Morton Downer and will have the
  paperwork to prove it. The address given by “Downer” is, of course, someone else’s
  address. The driver of the truck will be a new hire, a young man named Martin Ray.
  Ray is a high school graduate who likes kids and is trying to earn some money for
  school.
  A few days after Ray gets his route established, the creature will ambush him, kill
  him and take his skin. Unlike his other victims, Ray has family in the area.
  Naturally, the creature will avoid the family and Ray’s friends. If the investigators
  contact Ray’s family, they might be able to learn when Ray has been replaced by the
  change in “his” behavior.
  If the investigators check out the truck itself, they will find it is fairly normal,
  except that it has a very large freezer with padding on the bottom (large enough to
  hold an adult human) and it has an odd device. The device looks like a large metal
  vat with a mixer and cooling tubes around it. The padded freezer is where the
  creature normally sleeps and cools its skin during the day. The vat is used to
  completely grind and liquify its victims for eating. The new owner will assume that
  the padded freezer is to keep delicate treats from being damaged and that the mixer
  is for making ice cream (it works fine as an ice cream maker).
  Action
  The action begins when the investigators go after the creature. Since so many
  different things could happen, only a general set of guidelines and hints can be
  provided.
  If the investigators talk to the creature while it is working, it will seem to be a
  normal person (the creature has lots of experience). If it become suspicious of the
  investigators, it will take action against them. It will offer them some of its “special”
  treats (treats it has infected with parasites and chemicals) and plan to attack them at
  night. If they seem too dangerous, it will either plan a subtle attack or leave the area
  and take a new identity.
  If the investigators follow the truck during the day, nothing unusual will happen.
  They will just see “Ray” driving around selling ice cream. If they follow Ray home,
  they will see him go into his apartment for the night, at least until it decides to take
  a victim.
  If the investigators check out Ray’s apartment, they will see that there is dust
  everywhere and there is food rotting in the fridge. There is a large freezer in the
  middle of the main room. “Ray” sleeps in the freezer at night to help keep its skin
  from decaying as quickly. If the investigators bring this to the attention of the police,
  the police will point out that having a freezer is not a crime.
  If the investigators try to attack the creature during the day or when it is in Ray’s
  apartment, it will call for the police and try to act like a normal person, hoping the
  police will deal with the situation. If the investigators are able to expose it, it will try
  to escape.
  If the investigators follow “Ray” long enough, they will see it leave the apartment
  
  at night and go get the truck from the business. “Ray” will then drive to one of the
  neighborhoods along “his” route and park the truck. A few minutes later, a child
  will come out of the house, looking pale and dazed. If the investigators do not
  intervene, the creature will take the child into the truck, put him into the vat,
  “vomit” into the vat and drive away to someplace quite and isolated. It will then
  wait for the parasites and chemicals to start dissolving the body of the victim. Then
  it will turn on the mixer and feed. If the investigators attack it, it’s main goal will be
  to try to escape.
  Conclusion
  The adventure comes to an end when the investigators defeat the creature, are
  themselves defeated, or they give up.
  If the investigators defeat the creature, they should receive a 1D6 Sanity Point
  award for making the world a safer place. If they are able to provide the police with
  enough evidence, they might be able to help Helmsworth. Knowing the creature has
  been destroyed might help Helmsworth recover. If the investigators actually save a
  child from the creature, the parents and the community will be grateful. The body of
  the creature would create quite a stir in the medical and scientific communities.
  Naturally, they will regard it as a mutant of some kind.
  If the investigators are not able to stop the creature or they give up, it will take 2-3
  victims and then move on to a new place. If the investigators know that the
  creature exists, they should lose 1D3 Sanity Points.
  The Ice Cream Man
  The creature is a one of a kind thing that was born to a woman centuries ago. At
  first, it grew up like a normal child, then its outer layer of skin began sloughing off,
  its eyes turned dull black, its teeth fell out, its lips enlarged until its mouth became
  like a sucker and it underwent other changes.  Among these changes was the loss of
  its gender and the alteration of its digestive system. It found it could only feed on
  human flesh that had been treated with its own hideous vomit. Over the years, it
  learned that its vomit contained parasites and chemicals that would weaken the will
  of a victim, enabling it to call the victim to it. The creature found that children were
  least resistent to its call and it decided to prey on them. It also learned that its
  skinless body could support, briefly, the stolen skin of another. It used this ability to
  disguise its true nature so it could more easily find victims.
  Its latest disguise is that of an ice cream man. For the creature, this is an ideal
  disguise. It can select its victims without creating any suspicion. The freezer in the
  ice cream truck keeps its stolen skin from rotting so quickly. Finally, it can use the
  ice cream to introduce certain parasites and chemicals into its chosen victim.
  As mentioned above, the creature can wear the skin of a human being, provided
  the person is within two size points of the creature. The skin will last up to a
  month, provided it is kept cold to retard the process of decay. The skin will give off
  an odor of decay, which the creature disguises with deodorants and cologne.
  The creature can also produce parasites and chemicals. When the creature selects a
  victim, it introduces the parasites and chemicals into the treat. Over the course of
  
  the day, the parasites reproduce and infect the victims brain. The creature can then
  send a mental call to the victim. If the call succeeds, the victim will come to the
  creature and be unable to offer any resistance. In game terms, the parasites lower the
  victim’s POW 1-6 points for the purposes of resisting the creature.  The chemicals
  and the parasites also make the victim weaker, inflicting 1D3 points of damage.The
  creature matches its POW with the victim and, if successful, the victim comes to the
  creature and is unable to resist. The victim can try to resist every fifteen minutes.
  The call uses up one magic point when used and then one point every fifteen
  minutes it is maintained.  The parasites are not known to modern science, but can
  be treated with antibiotics if the victim survives.
  In addition to its ability to call victims, the creature can also attempt to mentally
  dominate others and erase their memories. The attempt to dominate others costs
  the creature 3 magic points and requires that it matches its POW against the victim.
  If the creature is successful, the victim will be unable to move for five minutes,
  unless attacked or otherwise forcefully accosted. One the victim is unable to move,
  the creature can expend 3 more magic points and attempt to overcome the victim’s
  POW. If successful, the creature can order the person to go to sleep and forget
  everything that has happened. The creature can erase an hour of memory for every
  three magic points it expends.
  In combat, the creature can strike with its fists and use human weapons. It
  generally does not go armed, though. If it is not worried about revealing its true
  nature, it can also shoot forth its vomit up to ten feet. The vomit it expels is acidic
  and inflicts 1D6 points of damage, then 1D3 and then 1 point before losing potency
  (if it is not diluted or washed off first). The creature can make six such attacks in one
  day.
  The creature prefers to avoid combat. If confronted, its main goal will be to escape
  rather than fight. It is an intelligent, experienced and subtle creature, so it will act
  accordingly. It’s main weakness is that it can only feed on human flesh. It needs to
  consume a number of victims every thirty days whose combined Sizes at least equal
  its Size. Otherwise it loses one hit point every two days for each SIZ point it is short.
  As long as it is fed, it has amazing healing abilities, healing one point of damage
  each round. The creature is also effectively immortal: as long as it can feed it will
  not die of “natural” causes.
  STR: 17 CON: 16 SIZ:14  INT: 13 POW:15 DEX: 14 APP: (as per victim) EDU: 21 HP: 15
  DB: +1D4 
  Move: 8
  Sanity Loss: 1/1D6 to see the creature in its natural form.
  Important Skills: Bargain 65%, Biology 25%, Chemistry 25%, Conceal 65%, Drive
  Auto 60%, Fast Talk 65%, Hide 75%, History 65%, Jump 55%, Listen 65%, Locksmith
  21%, Persuade 65%, Sneak 65%, Spot Hidden 70%, 
  Weapons: Fist 75% 1D3+1D4, Vomit Spray 65% 1D6/1D3/1
  
  Handouts
  Hand Out #1
  Senseless Killing
  The merry bells of a ice cream truck bring joy to the hearts of the children, but
  today one set of bells fell silent. Jeffrey Kelly set out this morning in his ice cream
  truck to begin what he hoped would be a fun and profitable career. Sadly, tragedy
  struck. As Jeffrey was handing out frozen treats to the eager children, an
  unidentified man leaped out of a car and ran up to Mr. Kelly. According to
  eyewitnesses, the man calmly fired three shots from a small pistol into Mr. Kelly,
  then said “I got it wrong” and fled the scene on foot. Police are still looking for the
  gunman.
  
SOURCE: textdata/thevault/Call of Cthulhu (CoC) (BRP) [multi]/Adventures/1920s/CoC - 1920s - Adv - I Want You to Kill the Ice Cream Man (.pdf