captor [captors](one who is holding a captive) noun [UK: ˈkæp.tə(r)] [US: ˈkæp.tər]
hijacker [hijackers](someone who hijacks) noun [UK: ˈhaɪ.dʒækə(r)] [US: ˈhaɪ.ˌdʒækər]The hijacker demanded a ransom of two million dollars. = El secuestrador pidió un rescate de dos millones de dólares.
kidnapper [kidnappers](one who performs kidnap) noun [UK: ˈkɪd.næ.pə(r)] [US: ˈkɪd.ˌnæ.pər]