noun which may take the genitive case particle 'no'
after the fact; post-; ex post
Used in formal, legal, or news contexts to describe something happening or being considered after an event. Often contrasts with 事前 (before the fact).
See also: 事前
事後の対応が重要だ。
The post-event response is important.
事後報告で申し訳ありません。
I apologize for reporting after the fact.