Attorneys for Colorado theater shooter James Holmes will focus their case on showing he was legally insane when he opened fire inside a crowded cinema.

Starting Thursday, defense attorneys will try to show that Holmes' mind was so distorted by schizophrenia that he was unable to tell right from wrong during the July 2012 attack. Holmes killed 12 people and wounded 70 more.

If his insanity plea is successful, Holmes would be committed to a mental hospital indefinitely.

Prosecutors presented two months of emotional testimony and want jurors to convict and execute Holmes.

Defense attorneys plan to call at least two experts who found Holmes insane at the time of the attack.