Mark Hopkinson, American mass murderer (died 1992)

Mark Allen Hopkinson was a convicted proxy serial killer who was responsible for arranging the 1977 murders of Vincent Vehar, Beverly Vehar, and John Vehar, and the 1979 murder of Jeffrey Green, a key witness against him, in Wyoming. Hopkinson is the only person to have been executed by the state of Wyoming since the 1960s. Gerry Spence served as the special prosecutor who won the case against Hopkinson.