Article continues below advertisementMalcolm-Jamal Warner has died at age 54. The Cosby Show star lost his life after an accidental drowning, a reliable source revealed to a news publication on Monday, July 21.Warner's body was reportedly found on Sunday afternoon, July 20, near Cocles beach in Limon, Costa Rica, after he was caught by a high current in the ocean. After being formally identified by Costa Rican National Police, his official cause of death was listed as asphyxia, a condition in which the body is deprived of oxygen.