How do I find out if he took nudes?

I'm in NC with an ex. He contacted me from a different phone number and sent me a picture of myself (face only) that he screenshotted of of a video call.

THE PROBLEM:

We did some nude calls too. I never recorded him but with this photo he sent to get me to talk to him is obviously to scare me.

How do I play this cool to find out if he A) has nudes and B) get him to erase them?

How do I find out if he took nudes?
How do I find out if he took nudes?
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