well probably they tend not to get that because once you've done time in the U.S you're screwed whether it was for stealing a candy bar, dealing drugs, or murder.

On the other hand the exception to that rule would be - I've known guys who were drug addicts, caught, go through rehabs, and become counselors and psychologists in the judicial system. Which is pretty close to the scenario under discussion.

on edit - ok only know two guys who did that, but they exist.