CENTENNIAL, Colo. (AP) -- Jurors convicted Colorado theater shooter James Holmes on Thursday in the chilling 2012 attack on defenseless moviegoers at a midnight Batman premiere, rejecting defense arguments that the former graduate student was insane and driven to murder by delusions.

The 27-year-old Holmes, who had been working toward his Ph.D. in neuroscience, could get the death penalty for the massacre that left 12 people dead and dozens of others wounded.

Jurors took about 12 hours over a day and a half to review all 165 charges. The same panel must now decide whether Holmes should pay with his life.