Scenes after a shooting at the Table Mesa Dr. King Soopers grocery store in Boulder, Colorado, on Monday, March 22, 2021. (Steve Peterson, Special to The Colorado Sun)

A 22-year-old man accused of killing 10 people at a Colorado supermarket briefly appeared in court Tuesday for a hearing to discuss what will happen next in the case.

The hearing lasted about two minutes and wasn’t substantive. A preliminary hearing was set for September.

The status hearing was only the second court appearance for Ahmad Al Aliwi Alissa since the March 22 attack in Boulder. At his initial hearing days after the shooting, one of his lawyers, Kathryn Herold, said the defense needed two or three months to evaluate his “mental illness” and evidence collected by investigators before proceeding. She did not provide any details on his mental health.

A law enforcement official briefed on the shooting previously said that the suspect’s family told investigators they believed Alissa was suffering from some type of mental illness, including delusions. The official was not authorized to speak publicly and spoke to The Associated Press on condition of anonymity.

Alissa is accused of killing nine shoppers and workers inside and outside the store as well as one of the first three police officers who entered the store. He has also been charged with attempted first-degree murder for allegedly firing at 26 other people, including 11 law enforcement officers. He is also accused of unlawfully possessing 10 high-capacity ammunition magazines, devices banned in Colorado after previous mass shootings.

Investigators have not released a possible motive for the attack. District Attorney Michael Dougherty has said there was no indication that Alissa, who was from the nearby suburb of Arvada, had ever visited the supermarket before.

This byline signifies that an article uses reporting from both a Sun staffer and The Associated Press. AP stories may be edited by a Sun editor to include our reporting. Or, a Sun editor may include reporting from the AP in an article written...