According to police, a clerk at a Columbus pawnshop discovered the video after Melvin Blevins sold his camcorder for cash, 10TV's Maureen Kocot reported.
"They were going through the hard drive on the camera and came across the video images," said Pataskala Police Chief Chris Forshey.
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Blevins, 18, was arrested last month when drug enforcement agents raided his home and found more than 2,000 pounds of marijuana, Kocot reported.
Agents also recovered $4 million in cash and dozens of firearms.
Police said the video showed Blevins holding a pipe filled with marijuana to the 2-year-old's lips. A short time later, the child is shown seated on the lap of a 16-year-old girl.
The next 18 seconds showed the girl coughing and trying to speak, Kocot reported.
"Get your water," a voice said.
Forshey said the video was one of the most disturbing clips that he's ever seen.
"You can tell that she's inhaling some of it," Forshey said. "You can tell that she doesn't want to. So it's a pretty disgusting video."
When asked if she wanted more, the girl shook her head no, Kocot reported.
"No?" a voice asked. "You're good?"
Court records obtained by 10TV News revealed that Blevins told investigators that it was him in the video. However, Blevins told detectives that he did not remember doing it, Kocot reported.
Blevins declined to speak with 10TV News about the case.
He was scheduled to appear before a federal judge on Tuesday for a detention hearing.
The 16-year-old girl who appeared in the tape faces delinquent charges of corrupting and endangering a child, Kocot reported.
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