Harris was arrested Friday, two days after shootings at a Downey business and home left three people dead and two others wounded.
Monday, 30-year-old Harris was charged with three counts of murder, two counts of attempted murder, three counts of kidnapping for carjacking, three carjacking counts, two kidnapping counts and one count of possession of a firearm by a felon.
The complaint against Harris also includes four special circumstance allegations: murder while lying in wait, murder in the commission of a kidnapping, murder in the commission of a carjacking and killing a witness to a crime. The allegations would make Harris eligible for the death penalty if he is convicted. The District Attorney's Office will not decide whether to seek the death penalty until the case moves closer to trial.
Harris was scheduled to be arraigned Monday afternoon, but the arraignment was postponed until November 28.
Family members were in the courtroom when Harris made an appearance Monday. Family members said they had never seen the suspect before.
Harris reportedly went to the United States Fire Protection business Wednesday to look at a 2010 Chevrolet Camaro SS he found for sale online. He allegedly had $25,000 cash for the purchase. But when he arrived, the car was not there. According to a family friend of the victims, Harris became enraged.
Josimar Rojas, who not only worked at the shop but was also handling the car sale, was shot dead along with worker Irene Cardenas.
Harris then allegedly forced Susan Perez-Ruelas, the wife of one of the shop's owners, and her 13-year-old son to take him to their home down the street where the Camaro was located. According to the family friend, the 13-year-old told Harris to take the keys and leave. Harris then allegedly shot and killed Perez-Ruelas and shot the boy in the arm.
The boy was treated for his injuries and was later released from the hospital. The boy's grandmother was also reportedly shot. She remained in the hospital Monday.
Court record show Harris has prior convictions for firearm-related charges, robbery and burglary. Harris is being held without bail.
Friends, family, and neighbors on Sunday night continued to place candles and flowers outside the business to honor the victims.