WAUKESHA, Wis. (AP) — The second of two Wisconsin girls charged with repeatedly stabbing a classmate to impress horror character Slender Man will plead guilty in a deal that will send her to a state mental hospital and bring an end a case that shocked people in part because the attackers were only 12.

The deal, announced in court Friday, means both girls will avoid prison time for the attack on Payton Leutner, who was also 12. Morgan Geyser, now 15, will be treated indefinitely at a mental hospital. Her co-defendant, Anissa Weier, faces at least three years in a mental hospital.

"It's been a t...