A Tennessee soccer coach has been charged with drugging children and recording himself raping the unconscious boys over the course of 20 years.

The Franklin Police Department said that Camilo Hurtado Campos, 63, has been charged with child rape and sexual exploitation of children and that more charges are expected, WSMV reported.

The victims ranged in age from 9 to 17, investigators said.

Police launched their investigation when Campos left behind his phone at an area restaurant. Employees, hoping to find the owner and return it, opened the phone looking for contact information.

“What they found, instead, were dozens of unconscionable videos and pictures,” Franklin Police Department Lt. Charlie Warner said.

Warner there were hundreds of the videos on the phone. Police said they have identified two of the victims from the videos so far and are working to identify them all.

Police were notified about the videos on June 22 and arrested Capos on June 23. Detectives say he targeted playgrounds and recruited children there to play on his soccer teams.

Anyone with children associated with Campos is urged to contact police at (615) 794-2513 or emailing this address.

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[Featured image: Camilo Hurtado Campos/Franklin Police Department]