American singer and actor Trini Lopez played a significant role in the 1967 action movie The Dirty Dozen, but his character mysteriously vanished midway through the story. Based on the 1965 novel by E.M. Nathanson, The Dirty Dozen is set in 1944, during World War II, and depicts 12 soldiers being trained for a military mission ahead of the Normandy landings. The movie was a critical and commercial success and inspired three television sequels in the 1980s. A Dirty Dozen remake was announced in 2019, with David Ayer set to serve as director.
https://screenrant.com/dirty-dozen-pedro-jiminez-trini-lopez-disappear-reason/