Ennis Cosby, the 27-year-old son of comedian-actor Bill Cosby, was fatally shot Jan. 16, 1997, in an attempted robbery while changing a flat tire in Los Angeles. Mikhail Markhasev, an 18-year-old Ukrainian immigrant, was eventually convicted of first-degree murder and attempted robbery in the shooting and sentenced to life in prison without parole. Bill Cosby had used Ennis, his only son, as the basis for Theo Huxtable, played by Malcolm Jamal Warner, on the sitcom "The Cosby Show."