<P> However , the Collector uses Larry as a decoy , so the trap kills Larry instead . Arkin then sends Hannah down a laundry chute to the basement where she hides . Before Arkin can go down the chute , the Collector attacks and knocks out Arkin . The Collector then takes Arkin captive and brutally tortures him . A police officer responding to Jill 's 911 call tries to arrest the Collector and is killed by the Collector 's dog , but manages to call for backup before dying . The distraction gives Arkin time to free himself , but he discovers Victoria dead and armed explosives in the basement . After killing the Collector 's dog with a flaming bucket and trapping the Collector in one of his own traps , Arkin finally escapes with Hannah . Arkin , seeing several approaching police cars , runs into the road to get their attention but is accidentally hit by one of the cars . While lying injured in the road he sees Hannah being scooped to safety by one of the policeman . An injured Arkin tells a police officer that the Collector was an exterminator also working at the Chase house . The explosives promptly detonate and destroy the house , but the Collector is seen running away from the house unharmed . </P>
who is the killer in the movie the collector
an exterminator also working at the Chase house