I would never keep an animal that I found in the wild, anyway. It's like... being kidnapped! Imagine his wife and kids one day... huddled in the livingroom with the police tortoise saying "I'm sorry... but there has been no sign of him for weeks... it's safe to assume the worst..." and now he gets to hobble home!!!

You made the right choice!

PS: turtle, or tortoise? everyone gets the terms mixed up hehe