The user traced to Peterson's address identified himself to an undercover officer as a 43-year-old man from Cary.
The search warrant quotes online conversations that undercover officers had with the account linked to Peterson.
"We had no complaints about anything like this or anything all about his teams," Slagle said.
Saturday on six counts of third-degree sexual exploitation of a minor.
Each charge carries a maximum possible punishment of 39 months in prison.
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He was suspended Sunday from his position at Green Hope High.