I cannot say I am an expert here, but TIME is your friend. 9 years is a long time to not trust humans. Food is your next best friend. Use the best stuff you can, the stuff he likes to eat the most, to keep him near you, even if that is 3 feet away at first. Stay low to the ground when approaching, I've even been know to lay on the floor belly up (the position of submission) in order for them to not fear me. It may be slow progress. I'll rack my brain for other ideas. keep us updated. Please.