UNDATED (WSAU) A lawsuit filed by the families in a deadly Crandon shooting from 2007 has been dismissed. The victims’ families argued that Crandon and Forrest County officials should have known that gunman Tyler Peterson was mentally unstable, and that he should have been removed from the police and sheriffs department. The off-duty officer went on a shooting spree that killed six people and wounded a seventh after he was rejected by an ex-girlfriend. Peterson later died in a shootout with police.

The judge’s ruling says Peterson was properly screened for law enforcement work at the time he was hired, and that the city and county are not liable for the shootings.

The judge said there is no screening test that can guarantee the mental health of someone working in law enforcement.