YOU SAID:

I've done several crimes and nobody knows.

INTO JAPANESE

私はいくつかの犯罪をしました、そして誰も知りません。

BACK INTO ENGLISH

I have committed some crimes, and no one knows.

INTO JAPANESE

私はいくつかの犯罪を犯しました、そして誰も知りません。

BACK INTO ENGLISH

I have committed some crimes, and no one knows.