ASTORIA, Ore. (AP) — A Seaside man was sentenced Tuesday to 25 years in prison on child pornography charges.

David Norman Hall Sr., 52, pleaded no contest to four counts of using a child in display of sexually explicit conduct, The Astorian reported.

He was arrested in March 2019 after police received a tip from the National Center for Missing and Exploited Children.

Starting in 2015, Hall would pose as a younger person on platforms like Instagram and Google Hangouts, District Attorney Ron Brown said. He said Hall would send explicit photos he had of teenagers and then try to get children to send their own sexually explicit images back.

Brown said there were at least four victims between the ages of 10 and 14 years old around the country.

Brown recommended a 25-year sentence because of Hall’s criminal history involving children including convictions of sexual abuse and endangering the welfare of a minor, among others.

Hall’s sentencing Tuesday was conducted via teleconference because of restrictions in place due to the coronavirus.