San Mateo police homicide protocol

A perimeter set up by the San Mateo Police Department at the corner of Speers Avenue and Washington Street in San Mateo.

A 42-year-old man was killed on Monday morning after a shooting at his house on the 1700 block of Pierce Street in the south Shoreview/Parkside neighborhood by a 48-year-old man who later killed himself in what authorities are investigating as a murder-suicide, the San Mateo Police Department said on Monday.

San Mateo police officers first responded to the shooting on Pierce Street. A few minutes later, they received information on the shooting from a 911 call from a neighbor. They were able to determine the suspect’s identity in the shooting and that he had returned to his house, which was in the 1600 Marina Court area, near Lakeshore Park, about a mile away. Police arrived at the area and started crisis negotiations with the man and activated the North Central Regional SWAT Team and the Crisis Negotiation Team, which came and took over negotiations. Officers learned the suspect’s wife was inside the house with him. According to San Mateo police, the woman decided to stay inside the house during negotiations, which authorities took into consideration when negotiating. She survived and was unharmed. After a four-hour negotiation with the man, he committed suicide inside his home at 12:12 p.m., authorities said. Officers also heard a shot on the negotiation line, authorities said.

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