Washington Redskins safety Montae Nicholson is off the hook in his assault case -- prosecutors have dropped the criminal charges against him ... despite video showing the NFL player K.O.'ing a guy.
As we previously reported, Nicholson was arrested in Virginia back in December for assault and battery and public drunkenness after video showed the 23-year-old beating the hell out of a guy in the middle of the street around 2 AM.
You can see Nicholson throw a solid left which connects -- and the other man goes limp as he collapses to the ground.