Mark Tomaso

Mark Tomaso is the deuteragonist villain of the exploitation film Cannibal Holocaust. He is one of Alan Yates's "friends" who aids his psychopathic "hobby" of touring the world and deliberately creating atrocities so as to obtain footage for "documentaries". In the main story of movie, he is already dead and their role is revealed through the film they made.

History
Mark Tomaso is a member of Alan Yates’s film crew. In 1979, he travels to a remote rainforest along with Yates and the other crew members (Jack and Faye) in order to film a documentary called “The Green Inferno”. At first, the crew members appear to be normal and amiable people, but the documentary footage they made reveals what they’ve really been doing.

After reaching the rainforest, the film crew capture and kill a turtle. Mark and Alan film as Jack and Felipe mutilate the turtle. Upon following the natives to their village, Mark burns down the entire village with the natives in them under Alan’s orders and laughs while doing so.

Later, Mark takes part in gang-raping a native woman, and in the next scene, he films the woman’s impaled corpse with the implication that he and the other crew members killed her.

When Jack is killed, Mark is completely apathetic and films his death. Then when Faye is captured, Alan tries to save her, but Mark convinces him to leave Faye to die. He then proceeds to film her gruesome death. Mark ultimately gets raped and killed by the tribe as the last surviving member of the crew.

Personality
Tomaso mantained a friendly facade to hide his true nature. Actually, he's a ruthless, sadistic, arrogant and racist person who wanted to deliberately defile the jungle for personal enjoyment: he mostly stuck to filming but did several villainous acts in the film such as burning a village and forcing women and children to remain in the burning huts, filming their deaths.

He also happily engaged in a gang-rape of a local woman under the "invitation" of Alan and Jack, Alan thinking it was all "fun" and even going as far as play-fighting with an enraged Faye (who objected to "wasting film").

Mark would remain at Alan's side during the native's revolt and convinced a scared Alan to continue filming even as Faye was raped and mutilated by the tribe - yet much like Alan his desire for bloodlust was his end and he was tracked down and killed by the tribe, who proceeded to eat his remains before finally clubbing Alan to death, ending the crew once and for all.