Competency hearings scheduled for girls accused in Slender Man stabbing

One of the two 12-year-old defendants is led into the courtroom in Waukesha, Wis. on Thursday, Dec. 18, 2014 during the trial for the stabbing of a third girl in May 2014. The two girls told detectives the attack was an attempt to please Slenderman, a fictional character they found on a horror website. (AP Photo/Milwaukee Journal-Sentinel, Michael Sears, Pool) (The Associated Press)

One of the two 12-year-old defendants is led into the courtroom in Waukesha, Wis. on Thursday, Dec. 18, 2014 during the trial for the stabbing of a third girl in May 2014. The two girls told detectives the attack was an attempt to please Slenderman, a fictional character they found on a horror website. (AP Photo/Milwaukee Journal-Sentinel, Michael Sears, Pool) (The Associated Press)

One of the two 12-year-old defendants' hands are unshackled to allow her to make notes in a courtroom in Waukesha, Wis. on Thursday, Dec. 18, 2014 during the trial for the stabbing of a third girl in May 2014. The two girls told detectives the attack was an attempt to please Slenderman, a fictional character they found on a horror website. (AP Photo/Milwaukee Journal-Sentinel, Michael Sears, Pool) (The Associated Press)

Two Wisconsin girls accused of trying to kill a classmate to please the fictional character Slender Man will go before a judge considering their competency to stand trial.

Defense attorneys are challenging findings from state doctors that the girls are fit to stand trial on attempted homicide charges. Waukesha County Circuit Judge Michael Bohren is scheduled to hold back-to-back hearings for both girls on Thursday.

Court documents say the girls plotted for months to kill their friend before they attacked her in May in a Waukesha park. The victim was stabbed 19 times but survived.

All three girls were 12 at the time. The Associated Press is not naming the alleged attackers because their attorneys have said they will seek to have the cases moved to juvenile court.