Is he guilty? Highly probable. Will he be convicted? Again, highly likely. Does he deserve the death penalty? Since he gunned down innocents of all types, races, and ages he most definitely does. Will he get the death penalty? More than likely he won't. Now that he is off the streets, is he no longer dangerous? Unequivocally no! How would you like your son to be sentenced to prison for car theft and have to spend his time there in close proximity to this type of cold-blooded killer.
He'll more than likely kill in prison. If given a life sentence, he'll have nothing to lose by killing anyone who crosses him.
Regards, Shuckins