Anissa E. Weier, 13, one of two girls accused of stabbing their classmate 19 times to appease an internet meme, the Slender Man, was found competent to stand trial for attempted homicide Thursday, the Associated Press reported. All three girls were 12 at the time of the crime in June.

The other girl accused in the stabbing, Morgan Geyser, was found mentally incompetent to stand trial in August. A hearing to confirm her mental competency is also due today. Geyser has been receiving court-ordered mental treatment since August after a state psychologist testified that she claimed to see fictional characters including Slender Man and figures from the Teenage Mutant Ninja Turtles and Harry Potter franchises.

A state psychiatrist determined that Weier was able to assist in her own defense. Her lawyer argued that he had a report from a different doctor who disagreed with the mental competency ruling. A judge had previously deemed Weier competent to stand trial in October, but her lawyers challenged that ruling.

Both girls from southeastern Wisconsin were charged with attempted first degree intentional homicide for nearly killing their classmate, Payton Leutner, during a sleepover by repeatedly stabbing her, missing a major artery near her heart by only a millimeter.

The girls told detectives they wanted to become "proxies of Slender Man,"

a popular, creepy internet meme often described as a tall faceless black-and-white figure who can make people who see him go crazy and lose their memory.

Wisconsin law requires suspects in severe crimes to be charged as adults if they are at least 10 years old.