not an accident
This was not an accident.
Vielleicht war es kein Unfall.
Maybe it wasn’t an accident.
Father's death was not an accident.
— Indian Love Story - Kal Ho Naa Ho (2003)
Es war jedenfalls kein Unfall, wie wir alle geglaubt haben.
It certainly wasn't an accident, as we all believed.
— Rebecca (1940)
Meinst du, dass es möglicherweise kein Unfall war?
Do you think it might not have been an accident?