Milwaukee Bucks player Sterling Brown claims one of the cops involved in his violent arrest later joked about unleashing a similar beating on J.R. Smith ... this according to Brown's lawsuit.
Brown is suing the Milwaukee PD and all of the officers who responded to the handicap parking dispute outside of a Walgreens back in January. Brown was brutalized and tased, despite never doing anything to warrant a physical altercation.
Now, Brown says one of the responding officers -- Erik Andrade -- mocked the incident on social media .