What Evidence is Needed to Make an Arrest?
state-by-state basis. For example, 22 states and the District of Columbia have some form of a mandatory arrest law, which means that police must make an arrest if there is probable cause that an act of domestic violence has occurred (in some cases, they will actually arrest both people believed to have been involved in domestic abuse). The success of this type of law has been contested for year, and new evidence even suggests that mandatory arrest does more harm [...]