Austin “Chumlee” Russell, one of the stars of the popular History show “Pawn Stars,” was arrested in Las Vegas on Wednesday during an investigation into a sexual assault case. No charges have been filed in connection with the alleged assault, which is still under investigation, Deadline reported. However, police found at least one gun as well as methamphetamine and marijuana during a search of the 33-year-old reality star’s home. “We don’t have details yet but are here to help Chumlee however we can,” Rick Harrison, Russell’s costar and owner of the Gold & Silver Pawn Shop at the heart of the show, told the Las Vegas Sun. Russell was taken…