YOU SAID:

I had had seen police police police.

INTO JAPANESE

私は警察の警察を見たことがあります。

BACK INTO ENGLISH

I have seen police cops.

INTO JAPANESE

私は警察の警官を見ました。

BACK INTO ENGLISH

I saw a police officer.

INTO JAPANESE

私は警官だ

BACK INTO ENGLISH

I am a police officer.

INTO JAPANESE

私は警官だ

BACK INTO ENGLISH

I am a police officer.