16 Arrested During "Operation Guardians Of Innocence VII" Child Pornography InvestigationOn Friday, September 24, 2021, the Polk County Sheriff’s Office concluded a month-long undercover investigation to identify suspects who possess and share child pornography. The operation, called “Operation Guardians of Innocence VII,” was carried out by undercover detectives from PCSO’s Computer Crimes Unit and resulted in the arrests of 16 people.