Durable Mexican-American actor Pepe Serna has appeared in more than 100 feature films and 300 television shows, but is most recognized for his gritty support performances in a variety of motion pictures, including Scarface (1983) as Al Pacino's ill-fated cocaine partner, as well as the western Silverado (1985) with Kevin Costner, the crime yarn The Rookie (1990) starring Clint Eastwood and Charlie Sheen, and the drama American Me (1992) starring Edward James Olmos. In a career surpassing five decades, Pepe's characters have played on both side…