MADISON, Wis. (AP) — One of two Wisconsin girls who tried to kill a classmate to win favor with a fictional horror character named Slender Man has been sentenced to 25 years in a mental hospital, the maximum punishment possible.

Anissa Weier, 16, pleaded guilty in August to being a party to attempted second-degree intentional homicide, but she claimed she wasn't responsible for her actions because she was mentally ill. In September, a jury agreed.

Waukesha County Circuit Judge Michael Bohren on Thursday sentenced Weier to 25 years in a psychiatric institution, retroactive to the date of the cr...