What factors determine whether an assault will be vigorously looked into pursued and charged by the police or not? Meet Bob. He has filmed some thugs assaulting him by shoving, hitting, kicking at him and forcibly taking his phone away on the street until a passerby finally strongly urged him to give it back. Bob reports this criminal assault to the police some months later while submitting his incontrovertible video evidence. What factors would determine the degree of rigour with which the police look into a pursue this crime?
There are two related questions: What factors determine how police will exercise their investigative discretion? How will charging decisions be made? Investigative Discretion I cannot enumerate the multitude of factors that inform the police's investigative discretion, but this guide from the College of Policing is a good resource. At the initial stage, factors include: scene management, risk management, record keeping, community impact. The priorities are to: preserve life, preserve scenes, secure evidence, identify victims, and identify suspects. The initial investigation is aimed at dealing with the immediate needs of victims and witnesses and gathering enough information to allow an investigative evaluation. Whether the investigation goes further depends on the circumstances of the crime, the material gathered so far, and resource requirements. Eventually, the police will coordinate with Crown Prosecution Service to identify further investigative needs of the prosecution, if a charge has been laid or is being considered. More specific steps are discussed here. Importantly: Each force sets their own crime investigation standards, which are disseminated to staff. They should be interdependent with the national intelligence model, to ensure that they support the deployment of appropriate resources to areas of identified priority at the correct time. Police officers exercise a high level of discretion when dealing with situations on the street. This is not directly overseen by sergeants and inspectors, and this makes the supervision of frontline officers challenging. Crime investigation standards are, therefore, useful to monitor and measure the performance of individual investigators and the quality of the investigation. Prosecutorial Discretion Here are two resources describing the charging decision: College of Policing, Charging and case preparation Crown Prosecution Service, Charging (The Director's Guidance) The default is that in order to charge, prosecutors must be satified that there is sufficient evidence to provide a realistic prospect of conviction and that there are no public interest factors tending against prosecution which outweigh factors in favour of prosecution. But, there are a limited range of cases in which the seriousness or circumstances of a case justify making an immediate charging decision, even though there is insufficient evidence to meet the &quot;realistic prospect of conviction&quot; standard. In order to charge in these special circumstances, five conditions must be met. I will not describe these in detail, but there must reasonable grounds to suspect that the person has committed the offence (this is a lower standard than a &quot;realistic prospect of conviction&quot;), there must be further evidence forthcoming, the seriousness of the case justifies making an immediate decision, there are substantial grounds to object to bail, and it is in the public interest to charge. Further, there is a lot of discretion for police or prosecutors to proceed with an out-of-court disposal where it is in the public interest and is an appropriate response.
Bob appears to have committed &quot;attempted larceny&quot; by extortion, contrary to § 155.05(2)(e)(v): (e) By extortion. A person obtains property by extortion when he compels or induces another person to deliver such property to himself or to a third person by means of instilling in him a fear that, if the property is not so delivered, the actor or another will: ... (v) Expose a secret or publicize an asserted fact, whether true or false, tending to subject some person to hatred, contempt or ridicule; See § 110.00: Attempt to commit a crime. A person is guilty of an attempt to commit a crime when, with intent to commit a crime, he engages in conduct which tends to effect the commission of such crime. And see § 110.10 which covers the &quot;impossibility&quot; that Bob actually had compromising images from Alice's non-existent webcam: Attempt to commit a crime; no defense. If the conduct in which a person engages otherwise constitutes an attempt to commit a crime pursuant to section 110.00, it is no defense to a prosecution for such attempt that the crime charged to have been attempted was, under the attendant circumstances, factually or legally impossible of commission, if such crime could have been committed had the attendant circumstances been as such person believed them to be. (NB Bob's sentence, if found guilty, would depend the value of his attempted extortion)
Unless there is enough evidence to convict one or more of the suspects, none will be convicted. In general the argument: We know it must be one of you, but we don't know whch, so we find you all guilty. is not allowed in any non-dictatorial jurisdiction. Just how much evidence is needed for a conviction varies by jurisdiction in theory, and by judge or jury in practice. Also, it would be possible to charge several of the residents with having acted jointly in the crime, but there would still need to be sufficient evidence against each defendant to obtain a conviction.
Yes and no. There are numerous cases where criminals, upon breaking in to somewhere, find evidence of a worse crime and notify authorities. This will provide reasonable suspicion enough for entering the scene. Generally, in testimony, Statements against Interest are more believable because a burgler wouldn't admit to breaking and entering if he had a way to explain why he was there in the first place. (Example: Alice breaks into a Warehouse and sees a mutilated body and blood everywhere. Alice immediately stops her theiving ways and calls 911 to let them know about the scene. Whether or not Alice stays, a dead body is enough probable cause to secure the crime scene without warrant. Its in Alice's interests to stay and help as there is trace of her at the scene and she would be pegged as a suspected murderer. If she's picked up and admits to calling the cops, it's good, but staying and helping out after the call will likely get her off on the charges related to the murder.). It could also work if they are persuing one crime and discover evidence of a second unrelated crime. (i.e. Alice robs the factory and gets away. The Factory Foreman calls the cops to investigate the crime scene, which at this point, does not need a warrant. While investigating, the Cops find security footage that Bob, the night guard, killed Chuck, a late night worker, removed his body, and cleaned the scene, all before Alice broke into the factory. The outcome of the case being made against Alice does not affect their need to prosecute Bob, as they obtained that evidence while looking for Alice in a valid investigation, not Bob, thus it is legal). Under these situations a crime that leads to a separate valid crime involving a different party is admissible. There are two possible reasons that the attorney might think this: Fruit of the Poisonous Tree: This is the obvious element... the kids committed a crime with the hopes that the cops would use the evidence found by them in their commission of a crime to get the real bad guys. The attorney parent thinks this is stupid because the kids broke in specifically to do this and thus any evidence is now tossed out of court. This isn't usually the case in how this scenario will play. Generally the cops are more than happy to look at evidence obtained by criminals that points to another crime. In fact, this is how a lot of gang enforcement units and drug enforcement units operate... pick up a small fish and cut a deal for evidence against a bigger fish (turning state's in the criminal lingo, as the witness is becoming State's Evidence to another crime). As long as it's given to the cops as part of legitament evidence seeking, the cops can follow the leads where ever they... er... lead... Chain of Custody: This is probably, if properly thinking, what the attorney parent is thinking that's a bit more probable. Lets say these kids found a dead body with a sword in it and take the sword to the police... this could get dicey as the kids have contaminated the evidence in possible ways that the killer's lawyer could get thrown out. One thing CSI doesn't always show (though there are a few episodes where it comes up, but not many) is that when something is taken in as evidence, it is carefully documented, sealed, and tagged with a check in/check out list. Every time the seal is broken, the person breaking the seal notes the time, date, and reason and when does, reseals it with a new seal, and signs the time and date of the seal again. This is so at trial, the attorneys know exactly who opened up the evidence, what they did, and what possible contaminants were introduced. You even have to sign into a crime scene before you go up to the yellow tape. A good defense lawyer would call into question any evidence from anything the kids handled to get the evidence tossed (i.e. Your honor, these Meddling Kids handled the sword without following the chain of evidence. They even let their dog handle it. They had already harrassed my client earlier today by insunuating that he was involved with a hoaxed paranormal activity to scare people away from the factory. Since they claim they found the sword, but did document it at the scene, we don't know anything about it prior to the police's chain of custody. I motion that the evidence be dismissed.) If this is successful, anything from the sword is now no longer admissible as if the sword had never been found (including blood of the victim on the blade and finger prints of the suspect on the hilt)... in effect the evidence was prossessed as best the police could but the veracity of the story of it's discovery is too questionable to be considered. The defense does not have to be right, he just has to show there could be another explanation for the sword and the evidence linking his client to the crime committed by it. In short, without specific details, the attorney parent could be right or could be wrong, or more humorously, right, but for the wrong reasons. Edit: U.S. only. See other answers for other jurisdictions.
It depends on the nature of the crime, among other things. Under Section 8 of the Police and Criminal Evidence Act 1984 (PACE) the police must provide evidence to a court that a search warrant is necessary to secure and obtain evidence relevant to an ongoing investigation into a crime. If there is evidence that time is of the essence with regards to the evidence at stake (e.g. there is a high probability that the evidence will be destroyed unless it is secured immediately) then the search warrant will be expedited. Once the search warrant has been secured, it will be an operational matter for the police to decide when and how to act on it. They could choose to do a dawn raid, for example, or they could monitor the suspect for a week and then search the property when the suspect is out. Be aware that under Section 18 of PACE, a search warrant is not necessarily required. The police may, in the course of arresting someone for an indictable offence, search the premises without a warrant provided certain criteria are met. Of course, this is predicated on the police having grounds for arrest, and in the vast majority of cases, a search warrant will be obtained.
Charged? Of course, the police can charge you with anything at any time Could you be convicted? Maybe. Their best shot is charging you with “Manslaughter by an unlawful and dangerous act” also called constructive manslaughter. The Crown must prove your act: was intentional, was unlawful, leads the reasonable person to realise that some other person is at risk of physical harm, and caused the death. The first two are uncontestable: the protesters are deliberately engaging in an illegal act. No 3 would be up to the jury. No 4 is also up to the jury and would turn on the evidence that the delay to the ambulance caused the death.
It's called police and prosecutorial discretion to discern when to arrest and prosecute; and that situation in particular is also the result of a decision of the jury of the court of public opinion. Permits are required to sell on the street in Oakland. But not everyone who sells has a permit, and not everyone who is confronted about not having a permit is arrested and prosecuted. There are simply too many potential cases to prosecute. And, the police officer has the discretion to ticket or not. When you get pulled over while driving or riding a bike, you don't always get a ticket, since the officer has the option of discretion. When the officer responded and found an eight year-old selling water, he obviously was aware of the fact that it was a violation. But he was also aware of the court of public opinion. What is it going to look like if he arrests an eight year old and their parent? Allison Ettel was right, in a purely legal sense, to make the report. And technically, the child (and adult) needed a permit. And could have been ticketed and prosecuted. But it was Ettel was tried and convicted in the court of public opinion, and she lost her case. Happens a lot.
The general rule is that using force in self-defense is justified if the person using the force reasonably believes it immediately is necessary to prevent the unlawful use of force against themselves or a third party. Deadly force is not generally justified except in response to a reasonable fear of deadly force, or to prevent certain violent crimes (like rape, kidnapping, robbery, etc.) Force is not justified in retaliation. In some states, if you're not at home (or maybe even then), you also have a duty to retreat before you can use deadly force in self-defense. So, for your specific questions: If they hit you once but aren't continuing to hit you, it's illegal to hit them back. You can only use force to defend yourself, not to get even. If someone gets in your face without touching you, you might be allowed to use force, but it depends on the circumstances. You don't have to wait for someone to hit you, but you can't sucker-punch someone because you want more space in a mosh pit. Your use of force needs to be something you reasonably believe to be necessary to stop/prevent their unlawful use of force. It also needs to be proportional to the force you're defending against; you can meet deadly force with deadly force, but shooting someone to stop them from slapping you is murder. Likewise, no one's going to believe that you really thought you had to beat the crap out of someone in order to stop them from slapping you, or that it's in any way proportionate to what they did. Deadly force is not allowed in defense of a person unless you reasonably think deadly force is needed to prevent the unlawful use of deadly force, or to prevent one of a few crimes being committed against them. Depending on the state, it might be presumptively justified if the person is trying to forcibly break into your occupied house, car, or place of business, but that's state-dependent.