Donald Eugene Webb holds the dubious record of the most time spent on the FBI's most-wanted list. On Dec. 4, 1980, Webb allegedly beat police chief Gregory Adams with a blunt instrument in Saxonburg, Pa., then shot him twice at close range. The attack reportedly occurred after Adams pulled over Webb's car, which had out-of-state license plates, during a routine check. Webb was charged with unlawful flight to avoid prosecution, murder and attempted burglary, and a federal arrest warrant was issued on Dec. 31 of that year. He was placed on the most-wanted list in 1981 and stayed there for such a long time 25 years, 10 months and 27 days that he was taken off in March 2007 on the assumption that he might be dead.