The team relied on emotional testimony from dozens of survivors, graphic photos and Holmes' own videotaped statements to a state-appointed psychiatrist to undermine his claim that he was so mentally ill he didn't know right from wrong at the time he killed 12 people and wounded 70.
Weapons dealers and investigators described how Holmes spent thousands of dollars to amass an arsenal of guns, ammunition, body armor and enough chemicals to rig his apartment into a potentially deadly booby trap.
But prosecutors showed Holmes' spiral notebook, in which he made lists of weapons he planned to buy and included detailed drawings of the theater complex complete with pros and cons of attacking different auditoriums. He wrote about an "obsession to kill" he held since childhood.
Holmes' defence said confusing musings about his life make up a greater part of the notebook, which included the word "why" repeated over several pages.