I heard this story about Atlas and Tyson on a Fox documentary that was made just after the Lennox Lewis fight. Apparently Tyson who was in his late teens got fresh with Teddy Atlas's young (under age) niece or something, Atlas claims that he put a gun to Tyson's head and fired a shot in the air, warning him not to mess about with his family. Tyson's recollection of the story was that he 'grabbed her ass a little'. I don't know if all this is true or not.
I find it funny looking at the archive footage of a skinny ymca moustached Atlas trying to strut around when Tyson looked three times his size at the age of 18.