The real Dexter Grif

What if Dexter Grif once wasn't a fat lazy bum but was a Spartan III? And the last Spartan III there was. And force to live a lie because of a mission gone wrong. What if Sarge and Caboose were ODST's from the same squad and were being punished for the death of there squad mates similar to Grif's experience. (AN. Smart Caboose and darker Grif.) Gralmer