MARIN COUNTY, Calif. (KRON) -- Three people, including two retired San Francisco Police Department officers, are dead after a suspected double murder-suicide inside a Marin County home Sunday night. Investigators with the Marin County Sheriff’s Office said dispatch received a call just after 5 p. m. about shots being fired inside a house on Strawberry Circle, just outside of Mill Valley. The caller who dialed 911 was inside the home at the time of the shooting and was able to exit safely, authorities said. Deputies entered the home after securing the perimeter and found three deceased individuals. They were identified by officials on Monday as 68-year-old Kevin M. Mannix, 65-year-old Ann Elizabeth Corriea Mannix and 24-year-old Katherine Elizabeth Mannix. Kevin was a retired SFPD sergeant with 27 years of service, according to the San Francisco Police Officers Association. Ann was a retired SFPD Deputy Chief who was with the department for more than 30 years. SFPOA President Louis Wong said the entire police force is shocked and reeling after hearing that Kevin allegedly shot and killed his wife Ann and their daughter Katherine before turning the gun on himself. Kevin Mannix, left, and Ann Mannix Arrest made after woman fatally shot in Oakland “To see their lives, and the life of their 24-year-old daughter Katie, end in such a horrific and senseless manner is a burden that weighs heavily on every officer, active and retired,” wrote Wong. San Francisco leaders reacted to the deaths on Monday. Mayor Daniel Lurie remembered Ann as a "trailblazer in the police department, becoming the first woman to join and lead the SWAT team and rising to lead both the Field Operations and Special Operations Bureaus." SFPD Chief Derrick Lew said in a statement, "The Marin County Sheriff’s Office has described this incident as a murder suicide, which makes the situation all the more difficult to process ... Ann Mannix served with honor and distinction at the SFPD for over 30 years." San Francisco Supervisor Matt Dorsey, who knew Ann, wrote Monday that he would "be exploring what more San Francisco can do to address the behavioral health challenges of our emergency responders — including those who have retired." The Marin County Sheriff's Office said there is no ongoing threat to the community. The investigation remains active. ...read more read less