Brian Williams (inset photo by John Koster/NCTimes) is accused of the brutal stabbings that took place July 18, 2011 on Paseo Montril in Rancho Penasquitos.
The son of a slain San Diego police detective will stand trial on charges that he stabbed to death his mother and sister.
Brian Williams waived his right to a preliminary hearing while in court Monday.
The defendant's mother, Donna Williams, was a detective in the SDPD Child Abuse Unit.
She was stabbed to death in her own home July 18 alongside her teenage daughter, Bree, a recent high school graduate and talented athlete.
Williams, 24, was found near the nude body of his sister in the front yard of the family's home on Paseo Montril.
Seven months ago, a judge ruled Williams was mentally incompetent to stand trial after his lawyer said Williams had an untreated, schizophrenia-type illness.
Charges were reinstated after he was treated at a mental hospital and declared competent.
Brian Williams could face life in prison if convicted.