Jimmie Johnson, Juan Pablo Montoya and Roger Penske are among the potential witnesses that could be called in the tax evasion trial of open-wheel racing driver Helio Castroneves, his sister, Katiucia, and his attorney Alan Miller. The trial is scheduled to begin Monday in U.S. District Court in Miami. If convicted on all counts, all three defendants could face 78 months in prison, according to pretrial briefs. Miller, a noted sports attorney, has Johnson among his clients and has put Johnson and team owner Penske on his witness list. Montoya and other open-wheel drivers will also appear on the witness list for Castroneves, who has driven for Penske in the Indy Racing League. The scope of their potential testimony is not listed, and their inclusion on the witness list is no guarantee they will actually be called to testify.