If you are charged, the police may release you on bail from the watch-house. Otherwise, they must take you to court as soon as possible and release you if the court grants bail.

He was found sufficiently suspicious/liable enough in the initial investigation to warrant being arrested and given a formal charge, but still released on bail.

If police charge you with an offence, they must give you a notice to appear or a full charge sheet (also called a bench charge sheet), which provides details of the charge. Police will provide the full charge sheet if they arrest and formally charge you at the watch house.

They saw what he was doing to her, agreed enough to charge him with a crime, and then released him, with details of her complaints to the police in hand. DVO + this new offense should have been obvious that he has reoffend - the police’s behavior was completely negligent