> It contained a letter informing him that he had been investigated as well as copies of the search warrants served on Google and his internet service provider. An investigator, whose contact information was provided, had asked for everything in Mark’s Google account: his internet searches, his location history, his messages and any document, photo and video he’d stored with the company.

> *The search, related to “child exploitation videos,” had taken place in February, within a week of his taking the photos of his son.*

So maybe no crime occurred, but google doesn't want that kind of user. I assume you can just type "child exploitation videos" into Google without breaking the law, but google may terminate your account.