SAN FRANCISCO (CBS SF) — The San Francisco medical examiner’s office on Monday identified a man who is believed to have killed himself and his 9-year-old son last week in a shooting in the city’s Marina District.

Officers initially responded to a well-being check in the 3800 block of Scott Street and found the man and his son, both dead from gunshot wounds, police said.

READ MORE: San José School District Secures Vaccine for Entire Workforce

The medical examiner’s office identified the man as 40-year-old Stephen O’Loughlin and the 9-year-old as Pierce O’Loughlin, both San Francisco residents.

READ MORE: Golden Gate Fields Races to Make Up for Missed Vaccine Appointments

Police are investigating the deaths as a murder-suicide.

O’Loughlin had reportedly been involved in an ongoing custody battle over the boy with his ex-wife.

MORE NEWS: Study Shows Stockton Universal Basic Income Experiment Led to Increased Employment

© Copyright 2021 CBS Broadcasting Inc. and Bay City News Service. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.