SFPD investigating Marina murder-suicide involving 9-year-old boy

San Francisco police are investigating an apparent murder-suicide in the city's Marina District.

Investigators entered the home on Scott Street shortly after 4 p.m. Wednesday afternoon, inside officers found the bodies of a 40-year-old man and his 9-year-old son.

Police sources said the boy's mother and father had been involved in series of lengthy legal battles dating back five years. The mother reportedly told investigators the most recent incident involved her trying to get the boy his childhood vaccinations, but the father did not want the shots to be administered.

The mother told police she showed up at the boy's school on Wednesday only to learn that he had not been in class all day.

She went to the father's home on Scott St. to find the shades drawn and no answer. That mother then went to police and was with them as they entered the home and found the son dead, and the father dead from a self-inflicted gunshot wound.

District 2 Supervisor Catherine Stefani released a statement reading in part, "my heart hurts and I am absolutely devastated for the little boy who lost his life in a tragic murder-suicide in the Marina last night. This past year has been an extraordinarily stressful one, and it has reminded me -- time and again -- why we need tighter gun laws and a much stronger mental healthcare system. If you or a loved one is struggling with suicidal ideation, please know that there is no shame in seeking help at 415-781-0500."

KTVU has reached out to the medical examiner to confirm the identity of the father and son, and so far the medical examiner’s office is not releasing that information.