Behavior like that is usually reviewed in a hearing with a judge outside if court & the judge decides along with a psycholigist & the family or guardian what needs to be done fo keep this behavior away from others. In Calif the police would put what they called a 5150 hold on the person (threat to self or others) & take them to a psych hospital. The hearings were usually held there in a conference room & decided what long term care was needed.

Asperger's is high functioning autism. This is NOT high functioning. Authorities will decide since it seems that functioning in society is not working well for this person.