Incapable of relationships. Incapable of sexual relations or may be very poor at it. Feel inferior to other people. Underachievers, most of low intelligence. They accept that they are underachievers.
Murder is triggered by mental illness.
Takes no or very little interest in the crime after it has been committed. Will have tried to get into the military with no success. Maybe would have spent some time in a mental institution. Living arrangements are very dirty and poor. Will hate women in general.