The 22-year-old Arvada man accused of killing 10 people inside a Boulder King Soopers last month now faces more than 50 charges in connection with the shooting.

Ahmad Al Aliwi Alissa was previously charged with 10 counts of first-degree murder and first-degree attempted murder of a police officer in the 20th Judicial District Court. 

On Wednesday, a motion was filed to charge the alleged shooter with an additional 32 counts of first-degree attempted murder — 19 of them for attempting to kill police officers, according to the court document. 

Additionally, the shooter has been charged with 10 counts of possession of a prohibited high-capacity magazine while committing a crime.

Authorities say Alissa entered the King Soopers at 3600 Table Mesa Drive in south Boulder on March 22, and began firing just after 2:30 p.m. During the massacre, customers, employees and one Boulder police officer were killed.

The shooter was eventually shot in the leg during an exchange of gunfire with responding officers. The shooter stripped to his underwear and put his weapon down before surrendering to police.

He was escorted out of the store to an ambulance that brought him to a local hospital to treat his gunshot wound. 

Officials have not indicated any possible motive for the attack. 

The shooter is scheduled to appear in court on May 25.  Prosecutors are expected to discuss the new charges at a news conference Thursday morning.