The arrest of Doctor Leonard McCoy by the Dramians in 2270 on a charge of having caused a plague that wiped out the colony on Dramia II nineteen years earlier.
McCoy had led a vaccination programme on Dramia II as a young doctor. Soon after he left, a plague killed almost everyone there. When the USS Enterprise next visited Dramia, its Supreme Prefect produced a warrant and imprisoned him.
In the Animated Series episode Albatross, Kirk and Spock go to Dramia II for evidence, shadowed by the Dramian officer Demos. They find a survivor, Kol-tai, who remembers McCoy with gratitude, but on the way back he and then the whole crew except Spock fall ill with the same disease, which changes the colour of the skin.
Spock breaks McCoy out of prison to find a cure. The doctor works out that the illness is brought on by an aurora and prepares an antidote from the antibodies of the immune Kol-tai. The Dramians drop the charge and honour him.