Judge Gilbert Martinez made no ruling on whether 57-year-old Robert Dear is competent to continue with his criminal case and set an April hearing on the issue.
Dear is charged with 179 counts of crimes stemming from the Nov. 27 shooting that also injured nine.
In previous courtroom outbursts, Dear declared himself a "warrior for the babies" and said he was guilty.
Martinez ordered the competency exam after Dear said he wanted to fire his public defenders and represent himself.