I don't know about what are you asking about child's play?
I met some deaf people with severe mental illness, including schizophrenia, bipolar and many of them are nice and well treated (some of them are zombie as side effect from medicine), even they know about not ok to harm to themselves and others, but I encountered one incident about man with mentally ill want to beat us up, so they got scared from him, so he has lower IQ that cannot communicate at all. That why therapist and psychiatrist frequently questioned them about harm to themselves and others.
FYI, there are many inmates in prison with mental illness and they didn't qualify or win the insanity plea defense (it is extremely rare). I know why about state of Wisconsin and victim family wants those girls to be locked up, whichever is guilty on charge or guilty by insanity, so they could end up in prison or state hospital, depending on verdict, so juvenile charge will show nothing for them.