same crime; same offense
Used when two or more people commit the same crime, or when an act is legally the same offense. Often appears in legal or news contexts.
They were indicted for the same crime.
equally guilty; sharing the blame
Often used figuratively to say someone is just as responsible or blameworthy as another, even if not legally charged. Common in expressions like 同罪だ (it's the same as being guilty).
You who watched in silence are equally guilty.
Saying you didn't know doesn't excuse it. That's just as bad.