It is relevant and should not be left out. "He broke tax law not declaring income." "Oh well where did that income come from?" "He is Chinese spy, but that's

It is relevant and should not be left out. "He broke tax law not declaring income." "Oh well where did that income come from?" "He is Chinese spy, but that's not relevant or important" "Oh... ok. So then, didn't he also break some other laws by spying for China?" "Yeah maybe, but we don't want to explore that."