Updated

A flood opened up a hole to reveal a stash of videotapes showing a man having sex with children, leading to the man's arrest, the FBI announced Wednesday.

Walter C. Stevens, 81, used to live in the house near the spot where the tapes were found. He turned himself in Wednesday after learning he would be charged with possession of child pornography.

The investigation began in August, when a flood uncovered a plastic bag holding the tapes. The person who found the bag turned it over to local police, who called the FBI when the videos appeared to contain footage of an adult man having sex with minors.

Investigators determined Stevens made the tapes showing him having sex with underage girls in Japan, Korea and Thailand between 1965 and 1986, FBI agent Deborah McCarley said.

If convicted, he could get up to 10 years in prison.

It was unclear whether he had an attorney.