After 18 years on the run, John List—who murdered his entire family in 1971—was captured in 1989 thanks to a tip sparked by America's Most Wanted. Living under an assumed identity in Virginia, List had remarried and worked as an accountant, showing no remorse and claiming his killings were 'mercy.' His arrest and conviction expose how a deeply religious, financially desperate man rationalized the systematic execution of his wife, children, and mother. John List murdered his family in December 1971, fled to Colorado and Virginia, and evaded capture for 18 years by assuming the identity Robert Clark—a mild-mannered accountant who attended Lutheran church and eventually remarried.