For serious crimes, an uncooperative witness can be held as a material witness to ensure their availability at trial. As the term infers, the witness' testimony must be critical to the case before a court will allow this to happen.
Some states have provisions in their laws to compel the cooperation of witnesses, usually called "obstruction of justice" or "withholding of evidence," but it usually takes more than just not talking to police to invoke this.
All that notwithstanding, a witness can be arrested for the same reasons anyone else can be arrested.
"Probable Cause"
In some cases, yes. He can arrest on a misdemeanor arrest warrant. Officers are frequently obligated to make an arrest for domestic violence if they have probable cause to believe the domestic violence has occurred, even though they did not witness it. An officer can usually make an arrest in a traffic accident investigation, even though he did not witness the accident.
Yes for perjury or ig they are implicated with some new evidence. It's not double jeopardy if you were only a witness. Get immunity first if it's a concern.
Yes, as long as they carry their warrant card. A citizen can arrest you if they witness you commit a crime. Police can do it if they suspect you have or are about to, whether they are on duty or not.
Rescue the individual being beaten and arrest the individuals assaulting them.
No. A police officer doesn't have to witness the assult to make the arrest. If the assault was of a Domestic Nature and the officers believe an assault occur he is required to make an arrest. The law 99-3-7 (3) uses the phrase "Shall" which gives the officer very little choice.
A deposition is a pre-trial discovery process where a witness provides sworn testimony. An arrest deposition would involve a witness providing testimony related to the circumstances surrounding an arrest.
Please define what you mean by "turned in." If a witness observed the offense and turned your name over to the police, yes, of course, that information may be used to identify and arrest you.
The police can arrest you ANYWHERE.
an arrest warrant.
no, you can not. but police can arrest you.
The police officer decided to arrest the suspect after reviewing the evidence.