I know several Marines in the 40 to 70+ age bracket.
They are Marines, not former Marines.
If this murderer is a former Marine, he got a less than honorable discharge.
I wouldn't trade one day of a full complement aboard (LPH-11) laying about everywhere and buying up all the ship's stores for anything I've done since for Veterans. It gave me great pride to launch them off the deck in the CH 46's and 53's and be their sea-going bellhop. I've worn that label with pride since to this day.