Prosecutors say Jesse James Warren opened fire at the Penske Truck Rental and Leasing center in Kennesaw, where he once worked, just before 2 p.m. on Jan. 12, 2010.
A medical evaluation in 2013 indicated Warren is incompetent, and Cobb Superior Court Judge Mary Staley directed him to undergo psychological observation at that time.
Assistant District Attorney Jesse Evans, the chief prosecutor in the case, said Wednesday Warren is “essentially refusing to take medication.” Evans said the medication would help control Warren’s mental issues so he can, ideally, be brought to trial.
Staley ordered Warren to take the medication Wednesday in response to a pre-trial motion filed by the state.
Evans could not say specifically what medications Warren is being required to take, but only he has declined to take two different prescriptions and medical experts could prescribe others for him.
Warren is being required to take the medication, Evans said, because Warren has pleaded not guilty to the shootings by reasons of incompetency and insanity.
Warren is facing 20 counts of murder, aggravated assault, aggravated battery and possession of a firearm.
He is accused of killing Jaider Felipe Marulanda of Lawrenceville, Robert Gonzalez of Dallas and Vance Springer of Woodstock, who all died within 24 hours of the shooting, and Zach Werner of Marietta, who died three and a half years later as a result of his injuries.
Warren is also accused of critically injuring Joshua Holbrook of Cartersville.
Springer, Gonzalez, Holbrook and Werner were Penske employees and Marulanda was a customer, the MDJ reported in 2013.
No trial date has been set yet, but Evans called Wednesday’s hearing an “important step” in prosecuting Warren.
“Families have been struggling with how difficult it’s been to bring this case to trial,” he said.