India, Oct. 13 -- Authorities are investigating a double murder-suicide involving two former San Francisco Police Department officers, ABC7 cited sources as stating. San Francisco Police Department Deputy Chief Ann Mannix, 65, and her 24-year-old daughter, Katherine "Katie" Mannix, were killed Sunday afternoon inside the family's home on Strawberry Circle in the Strawberry neighborhood near Mill Valley.

Investigators said that Ann's husband, former SFPD Sgt. Kevin Mannix, 68, is believed to have shot them in a suspected double murder-suicide.

Shortly after 5 pm, deputies responded to a 911 call reporting gunfire at the house. The caller managed to escape the residence before deputies arrived. Deputies arrived and found three deceased in...