Noticed people discussing institutionalization. This is highly unlikely in this crime and with his level of functioning.
It is rare someone gets instituionalzied for a crime because it requires the person to actually have a disorder that caused them to do it. Such as a schizophrenic person truly believing that killing a person saves them. It requires an inability to tell right from wrong in the moment due to mental disorder.
By Reason of Insanity Documentary by Louis Theroux shows more on this:
This woman is an example of a person who gets institutionalized for crimes. She thinks she is Jesus and that she had to kill someone due to it. So she went on a bus one day and stabbed a woman multiple times.