Adler Berriman "Barry" Seal (July 16, 1939 – February 19, 1986) was an American commercial airline pilot who became a major drug smuggler for the Medellín Cartel. When Seal was convicted of smuggling charges, he became an informant for the Drug Enforcement Administration and testified in several major drug trials. He was murdered on February 19, 1986, by contract killers hired by the cartel.