SACO (AP) — A candlelight vigil has been scheduled for the Saco family killed in an apparent murder-suicide.

The vigil has is planned for Tuesday at 8 p.m. outside the apartment where the family had lived.

Investigators said Joel Smith, a maintenance worker at the apartment building with financial problems, killed his wife and three children with a shotgun, then committed suicide, over the weekend in what state police called one of the worst cases of domestic violence in Maine history.

Police said 35-year-old Heather Smith was shot along with the couple’s 4-year-old daughter, Lily, in the parents’ bed. Joel Smith’s body was found on the floor nearby, the shotgun by his side.

The boys, 12-year-old Jason Montez and 7-year-old Noah Montez, were found dead in their separate bedrooms.