San Mateo, Calif. ? Police responding to a 911 call found the bodies of a woman and her two daughters stuffed inside a backyard freezer and the woman’s husband laying dead nearby, a gun at his side.

A typed note found on the dining room table indicating the killings may have been prompted by the family’s financial problems, San Mateo Police Chief Susan Manheimer said Friday.

San Mateo police said they received a call Thursday from a man they believe was Anthony Richards, 53, who said they would find bodies at a house on Maxine Avenue. A note on the front door directed police to the backyard, where the bodies were found, said Capt. Kevin Raffaelli.

Authorities said Richards had died of a self-inflicted gunshot wound, and they found a shotgun nearby. The other victims were identified as Anthony Richards’ wife, Nicole, 54, and his two daughters, Alexa, 17, and Tessa, 13.

Coroner Robert Foucrault said Nicole Richards died of “blunt force trauma” to the head. The cause of the daughters’ deaths had not yet been determined.