you dont have to release him heres what i did...
1)look up what food a shorthead garter eats
2) put him in a different cage with that food(no substraight but put a water source in it)
3)wait untill ffood is gone mine took over night Put the temporary cage w/snake and food somewhere where it wont be bothered by things such as under a bed or in a closet!!if u need any info on wild caught snakes pm me ill help!!!my snake checker is wild and we get along fine!!!itll be a while before he stops trying to run away ....then hell just poop in your hand when he wants to be put down!