Gary Antonio Williams, 59

Gary Antonio Williams, a 59-year-old black man, was shot and killed Tuesday, Feb. 28, in the 1400 block of Wright Street in downtown Los Angeles, according to the Los Angeles County coroner’s office.

About 3:30 p.m., Williams was sleeping on a sidewalk when a man walked up to him and began shooting, said Los Angeles Police Det. Doug Pierce.

Williams was pronounced dead at the scene at 3:40 p.m., according to coroner’s records.

Police do not have a motive but have arrested Karriem Raheem, a 36-year-old black man, on suspicion of murder, Pierce said.

Raheem has been charged with one count of murder with the allegation that he used a handgun, according to the Los Angeles County district attorney’s office.

Raheem also faces one count of possession of an assault weapon, one count of unlawful possession of ammunition, and two counts of possession of a firearm by a felon, Ricardo Santiago, a spokesman with the district attorney’s office, said in an email.

Raheem pleaded not guilty to the charges on March 3. On March 16, a doubt was declared regarding Raheem’s mental health, and the case was sent to mental health court, Santiago said.

An update on the case is scheduled for April 5.

Anyone with information is asked to call Pierce at (213) 996-1879. Those who wish to remain anonymous can call Crime Stoppers at (800) 222-8477.

Contact the Homicide Report. Follow @nicolesantacruz and @latimeshomicide on Twitter.