Full Notification

UPDATE (2/13/24 at 1:15pm): SMPD Continues Death Investigation of Four People

San Mateo, CA - On Monday, February 12, 2024, at 9:13 a.m., San Mateo Police officers were dispatched to the 4100 block of Alameda de las Pulgas on the report of a welfare check. After arriving officers were met with no response, they searched the perimeter of the home and did not see any signs of forced entry into the house. Finding an unlocked window, officers entered the home and located four people dead; 1 adult male, 1 adult female, and two children.

Tragically, the two children were found deceased inside a bedroom. Their cause of death is still under investigation. The male and female were located deceased from gunshot wounds inside a bathroom. A 9mm pistol and a loaded magazine were also found in the bathroom.
Our Criminal Investigation Bureau (CIB) took over the investigation and responded to the scene. The San Mateo County Crime Lab arrived and assisted our officers with evidence collection. The San Mateo County Coroner took custody of the four bodies and are working to positively identify each person and notify next of kin.

Based on the information we have at this time, this appears to be an isolated incident with no danger to the public as we are confident the person responsible was located within the home. This investigation continues as detectives work to gather evidence, speak to witnesses and family members, and determine a possible motive.
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On Monday, February 12, 2024, at 9:13 a.m., San Mateo Police officers were dispatched to the 4100 block of Alameda de las Pulgas on the report of a welfare check. Officers entered the home and located 1 adult male, 1 adult female, and two children inside with obvious signs of death.

Based on the information we have at this time, this appears to be an isolated incident with no danger to the public. Our agency is on scene as this investigation will be ongoing.

Road closures are as follows: Traffic is currently closed northbound Alameda de las Pulgas at 42nd Ave., southbound Alameda de las Pulgas at Fernwood St., and westbound 41st Ave to Kelton Ct. Please avoid the area.