Torg

From Memory Alpha, the free Star Trek reference

Torg was a Klingon officer who served as second-in-command on a Klingon Bird-of-Prey commanded by Kruge in the 2280s. He led a boarding party that beamed aboard the USS Enterprise and were killed when the ship self-destructed in 2285. (Star Trek III: The Search for Spock)

The Klingon Empire somehow acquired footage of Torg and the boarding party aboard the Enterprise as it exploded. The Klingon Ambassador presented it to the Federation Council when demanding James Kirk's extradition in 2286. The council denied this request. (Star Trek IV: The Voyage Home)

Torg was played by Stephen Liska. The footage shown to the council in Star Trek IV was of course footage from the previous movie, though, short of fabricating footage, it is unclear how they could have gotten it.