A charred and gutted sedan marks the most violent interaction yet between Albuquerque police officers and a volatile subject who calls himself "Superman Amir." Police say 32-year-old Joseph Grubb lit his girlfriend's car on fire Monday morning. He was arrested, but he is always let out of jail after being ruled incompetent to stand trial. Grubb isn't the only offender who bypasses the legal system through mental competency rulings, and it is highly frustrating for the law enforcement officers who frequently arrest these habitual offenders. Not only are these repeat offenders released, they are often not charged with an offense because judges determine they cannot understand the charges against them.