Nothing can really be done for them. Locking him up won’t do anything for them, either. One could argue for some form of restitution, but then you’d have to ask if they even want anything from the guy.
The real solutions are adequate mental healthcare and access to medication, as well as routine monitoring and check-ins. All following an extensive inpatient treatment and rehabilitation program… So, basically what they’ve done here. Fighting pain with more pain doesn’t do anyone good. It’s entirely reactionary. Locking someone up for life does not help anyone.
Helping the person get the treatment they so desperately need does.