Alphonso Talley was formally indicted on felony charges, including murder, attempted murder and armed robbery.
The shooting happened April 25 at Endeavor Health Swedish Hospital, located at 5140 North California Avenue, in the city's Ravenswood neighborhood.
During Wednesday's hearing, Talley's public defender objected to the prosecution's request for a DNA sample, but the judge denied that motion.
The prosecution on April 27 offered a brief synopsis of the events leading up to the fatal shooting, saying it all started at 8 a.m. April 25, when Talley allegedly robbed a Albany Park Family Dollar in the 3200-block of West Lawrence Avenue and pistol-whipped an employee. Attorneys say the stolen cash had GPS, and Chicago police tracked it to Talley, who they took into custody.
Prosecutors said Talley claimed to have swallowed drugs, so at that point, two officers escorted him to Endeavor Health Swedish Hospital in the city's Ravenswood neighborhood. As Talley was being prepared for a CT scan, he was stripped of his clothes but was apparently able to keep a blanket over him.
As soon as one of the officers uncuffed him, prosecutors say, Talley reached under the blanket and shot one officer in the head. He then turned and shot the second officer in the face before shooting out a hospital window to escape.
Prosecutors never said how Talley got the 10 mm handgun into the hospital. Officials with Endeavor Health say security wanded him as he entered the hospital and that nothing was detected.
He was eventually found a short time later under porch nearby. Cellphone video showed the moment Talley was arrested on Carmen Avenue, not long after he allegedly ran out of the hospital without any clothes on.
Friends, family and first responders gathered earlier this month for funeral services to remember the 38-year-old Chicago police officer killed in a North Side hospital shooting.
The officer that was shot and critically wounded in the shooting was moved to a rehabilitation facility last week, his family said.
Officer Nelson Crespo, 57, was still in the intensive care unit earlier last week, but his sister, Nancy, said he was being transferred Thursday.
Talley is due back in court again June 3.