The back of that shirt should show the shattered pieces of skulls and the brains spattered on the wall which was Che's hallmark. It would be appropriate to also have that carnage framed in a 1950s tv set along with the horrified look of a child and wife (to the now deceased) watching the state execution broadcast on all Cuba channels. Bonus points if you can figure into that picture a way to communicate that the bodies were thrown in unmarked mass graves and the family were not allowed to attempt recovering and burying their loved ones unless they wished to meet the same fate..

Che never participated in an execution he didn't sadistically enjoy (except maybe his own execution when Castro sent him to South America to "help" bring the revolution to their comrades down there and Castro double crossed Che by tipping off that nation to Che's whereabouts so that Che could be eliminated since he was a loose end for Castro at that point.