Can i keep my corn snake and a garter snake in the same tank?

i have a 20 gallon long tank and i have a 12-14 inch corn snake living in there i was wondering if i could put a 10-11 inch wild caught garter snake in there. i caught him like 2 days ago in my house and when i picked him up he bit me and wouldn't let go but now i can pick him up and he doesn't even strike at me. so could i put him in there with my corn snake?