police officers have a criteria on this. On the other hand,for an officer of the law, it would be unethical not to arrest someone he has seen comiting a crime.
Yes, of course. An arrest warrant is a command from a judge to arrest a person. Usually a police officer has no choice and must arrest.
Trespasser is the term for this. This is illegal and you can be arrested for it. A police officer will not usually arrest someone the first time they are caught trespassing. But it is up to the police officer to arrest or not.
You could try a citizen's arrest but the police man may refuse to be arrested. It is only a warranted police officer that is empowered by society to forcibly arrest someone.
A person is "under arrest" when a police officer charges them with a crime and chooses to take them to the police station to be processed for it. For example, if someone commits a crime, they are technically under arrest when a police officer witnesses the crime or has a warrant for the arrest and tells the criminal "You are under arrest." Typical procedure after this is to put handcuffs on the criminal and read them their Miranda rights (you have the right to remain silent etc). Handcuffs alone do not mean arrest, but i'm pretty sure its illegal for a police officer to handcuff someone without grounds to arrest them. As a side note, the person doing the arrest does not have to be a sworn in police officer. In Citizen's arrest cases, anyone with arresting powers like a bounty hunter can also place someone under arrest.
Police officers are on salary; they don't get paid on commissions. What that means is, they get paid the same whether they arrest someone or not.
yes
No.
A police officer making an arrest
Yes, if they believe you are holdng something or someone they can. Some states have a law where if the police officer can reach in you vehicle,they can take whatever they need to arrest you.
No, a police officer cannot issue a warrant for your arrest only a judge or court magistrate can do that.
It does not seem reasonable or possible.
The police officer decided to arrest the suspect after reviewing the evidence.