DENVER -- A psychiatrist who treated the suspect in last year's Colorado theatre shooting told police a month before the attack that James Holmes had homicidal thoughts. The attack killed 12 and injured 70 and was one of the worst mass shootings in U.S. history.

Documents released Thursday show Dr. Lynne Fenton told police at the University of Colorado, Denver, in June that Holmes also threatened and intimidated her.

Holmes last week offered to plead guilty. Prosecutors rejected that offer and said Monday they would seek the death penalty.

The newly released documents had been sealed. A new judge overseeing the case ordered them released after requests from media organizations including The Associated Press.