Prosecutors have formally charged the the man accused of opening fire Monday at a Boulder King Soopers with 10 counts of first-degree murder and one count of attempted murder, and said Thursday morning they eventually plan to file more charges.

Defense attorneys indicated they are evaluating the suspect’s mental health.

Ahmad Al Aliwi Alissa, 21, has been in custody since Monday and made his first court appearance Thursday.

He is being held on suspicion of the shooting attack at the King Soopers at South Broadway and Table Mesa Drive. Authorities have not commented on a possible motive.  

According to court documents, Alissa faces 10 counts of first-degree murder and one count of attempted murder. The charges filed Wednesday say Alissa faces the latter charge for attempting to kill officer Richard Steidell.

Defense attorneys did not give specific details of Alissa’s mental illness they referenced in Thursday’s hearing, but said they will need to go through prosecutors’ evidence to “assess the needs and depth of Mr. Alissa’s mental illness.”

20th Judicial District Attorney Michael Dougherty said during the hearing that prosecutors intend to file more charges in the coming weeks.

Alissa’s defense attorneys said he is willing to waive his right to a preliminary hearing within 35 days.

They requested a pretrial status hearing in about three months and said Alissa understands he will continue being held without bond in the meantime.

Judge Thomas Mulvahill agreed to grant a status hearing in 60 to 90 days before scheduling a preliminary hearing or a proof evident presumption great hearing.

For a judge to deny a defendant bail, prosecutors have to show the proof is evident or the presumption is great that the defendant committed the crime.

The next status hearing hasn’t been scheduled. Judge Ingrid Bakke will preside over the case.

The victims ranged in age from 20 to 65, according to information released by authorities. Alissa allegedly opened fire shortly after 2:30 p.m. Monday. By 3:30 p.m., police took him into custody.

By that point, Alissa had removed clothing and a tactical vest he wore, dressed only in shorts.

He suffered a gunshot wound to his upper right thigh.

The arrest affidavit states he did not appear to police under the unfluence of alcohol or drugs.

Alissa bought a Ruger AR-556 pistol on March 16, six days before the shooting, according to investigators.