NORTHRIDGE, Calif.—A 33-year-old man is in police custody on suspicion of fatally stabbing his mother in Northridge, authorities said March 11.

The suspect walked into the Devonshire Division of the Los Angeles Police Department (LAPD) at approximately 5:41 p.m. Friday and told officers he thought he had harmed his mother at their residence, an LAPD spokeswoman told City News Service.

Officers went to the residence on the 11000 block of Oakhurst Way and Mariposa Bay Lane, where they found the suspect’s mother, who was in her 70s, had sustained multiple stab wounds, authorities said.

The victim was pronounced at the scene and the suspect was taken into custody.