Why does my boyfriend have a screenshot of another girls instagram in his hidden folder?

I went through my boyfriend's phone (bad I know) and I went into his hidden folder and saw he had a screenshot of a girls instagram profile. He doesn't follow her but I saw her name on his instagrams search history. Why would he have a screenshot of her profile in a hidden folder? And when I confronted him about seeing her name in his search history he acted like he had no idea who I was talking about. Im just confused why he would lie and why he would screenshot her profile.

Why does my boyfriend have a screenshot of another girls instagram in his hidden folder?
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