Leon was a member of Dom Torettos crew in the original "The Fast and the Furious" movie. He was part of the four-person operation that would boost electronics from passing trucks, and he acted as a dispatcher. Leon was constantly present in scenes involving Dom, and his loyalty to the crew was unimpeachable. When things went wrong towards the end of the film, and Brians true intentions were revealed, Leon volunteered to fall back with Doms girlfriend Letty to ensure her safety. The last mention we get of Leon is when Brian asks what happened to him and Letty, and Dom assures him that theyre long gone.

After the first movie, Leon never returned to the franchise, and his fate has yet to be addressed in any way. Johnny Strong, the actor who portrayed Leon, has shared his own theories as to why Leon is still missing multiple movies later. He theorized that Leon left the gang as quickly and spontaneously as he joined, and that he had had enough of the situation after Jesse was killed, Letty and Vince almost died, and the heat had become too risky.

In conclusion, Leon left the crew after the events of the first movie, and his fate has not been addressed in any of the sequels.