participation in a crime

Criminals might proceed anonymously to conceal their participation in a crime.

"There's no legal system anywhere, that I know of, where participation in a crime is excused out of ignorance."

Therefore, it is an act that, while innocent per se, can potentially be used as evidence against someone during a trial to show his/her participation in a crime.

"You met with your friend Suvorov, Klementi Ivan'ch, to discuss participation in a crime.

When societies face their participation in a crime as overwhelming as the Holocaust, it is understandable that their memories sharpen, not dim, as time passes.