Former firefighter found not guilty in slaying of 4

A former Memphis firefighter who killed his wife, set fire to his home and fatally shot two firefighters and a sheriff's deputy who responded to the blaze was found not guilty Monday by reason of insanity.

The ruling means 47-year-old Frederick Williams will be committed to a mental facility indefinitely until further orders of the court.

Criminal Court Judge Arthur Bennett heard six days of testimony in the non-jury trial and announced his decision after more than two weeks' consideration.

Williams has acknowledged fatally shooting his wife, Stacey Williams, fellow firefighters Javier Lerma and William Blakemore and sheriff's deputy Rupert Peete Junior in March 2000.

Williams has spent the past four years at a mental health facility in Nashville being treated for paranoid schizophrenia and other issues.