bethmarie,
Just because he didn't play doesn't mean he didn't receive "benefit" redshirted or not those are the rules...You also can only receive 1 redshirt, there for your son has used up a year of eligibility if he was attending classes, unless the NCAA grants a special exception which is rare, sorry to say but your son only has 3 years left, and if he transfers to another DI and sits out he will lose another year of eligibilty. I hate to be the bearer of bad news...DII or DIII or staying are going to be your best options it sounds like...
Hita,
DI to DII no, DII to DI I believe so...transfering INTO a DI program from another NCAA institution I believe mean you have to sit out 1 year. But I'm not 100% sure as very very few transfer up...it's not something that is widely popular..