The goals of the police policy are to reduce family homicides, family assaults, police call-backs, liability risks for police, and injuries to officers. Effective domestic violence crime prevention requires a team effort involving dispatchers, police officers, and investigators. In both arrest and non-arrest situations, the officers will do all they can to help the victim, offender, and children. Supervisors must motivate, train, and direct personnel to perform their jobs in a compassionate and professional manner. Components of model policy guidelines for an interagency response to family violence include a judge's protocol, crisis intervention policy for advocates intervening in domestic violence cases, victim services protocol, treatment policy for mental health professionals, a parole and probation policy, and a protocol for law enforcement response when children are present.