SAN DIEGO -- A 24-year-old man was in custody Monday, suspected of stabbing his mother and sister to death, police said.
Police found the bodies of Donna and Breanna Williams at a home in the 9800 block of Paseo Montril in Rancho Penasquitos early Monday. The nude body of 18-year-old Breanna was lying in the driveway below a second-story balcony, police said. She had been stabbed multiple times.
Donna Williams 52, was found on the floor of her bedroom in the home. Police said she had also been stabbed multiple times.
When police arrived at the home, they found the Brian Williams sitting on the lawn near his sister's body. He was arrested on suspicion of two counts of murder and was being questioned by police.
Investigators found a kitchen knife at the house that they believe the son used to kill his mother and sister.
Neighbors told Fox 5 News that they called police early Monday after hearing screaming coming from the house.
"Around 1 o'clock, I heard screaming, and then I heard someone say, 'Do you need help?' So then, I ran out the door," one neighbor told Fox 5 News. "I couldn't tell where it was coming from, but it sounded like pain and she needed help."
"The preliminary investigation has only revealed there was a disturbance between the son, mother and daughter,'' San Diego police homicide Lt. Ernie Herbertsaid. "
Police did not release a possible motive for the slayings, but they said that officers had gone to the home shared by the three on June 30 to investigate another disturbance. No one was arrested at that time, but police would not elaborate on the incident.
Donna Williams was a 32-year veteran of the San Diego Police Department who worked investigating child abuse cases, police said. She was well-known and liked in the department, they said. She was a widow, whose husband, also a police officer, had died of in 2007 of natural causes, officials said.
Breanna Williams had recently graduated from Mt. Carmel High School. She had been accepted to study design in the fall at a school in San Francisco.