Complex sentence: In 1991, the films received additional media attention when Chris Gore, after meeting actor Charlie Sheen and giving him a copy, Sheen watched "Flowers of Flesh and Blood" and mistook it for a genuine snuff film, immediately contacting the FBI to report it.
Split into simpler sentences: In 1991, the films received additional media attention when Chris Gore, met actor Charlie Sheen and gave him a copy. Sheen then watched "Flowers of Flesh and Blood" and, mistaking it for a genuine snuff film, immediately contacting the FBI to report it.