CUMBERLAND, R.I. -- A 17-year-old Lincoln, R.I., teenager thought he was giving a relative a few canisters of film to be developed. But there wasn't just film in these containers.

He's now under arrest for possession for cocaine.

"An adult female dropped off two rolls of film to be developed," said Det. Richard Champagne of the Cumberland, R.I., Police Department.

But the technician working in the film department of a Cumberland pharmacy spotted white powder in one of the containers.

"She called the police. We went by, identified the item as cocaine through a field test kit," said Champagne.

Police waited for the owner of the film to return. About an hour later an adult male came in.

"He stated he was picking the film up for somebody else and that it belonged to a male juvenile who was a family member," said Champagne.

Police said the suspect made this case a bit easier for them. One of the canisters allegedly contained cocaine, while the other one contained film of the suspect himself.

"Those kind of things happen," said Champagne. "People don't think things through. It helps out a little." The suspect is unknown to police. He will appear in family court on a charge of possession of a controlled substance.