MSNBC's Ari Melber hosts "The Beat" on Friday, May 27, and reports on the new revelations about the police's response to the mass shooting in Texas, the NRA convention taking place in Texas mere days after the massacre in Uvalde, the Uvalde community's response to the police's inaction, and the gun epidemic in the U.S. Julián Castro and rapper Benny the Butcher join.