Fingerprints taken from a photo sent over WhatsApp have lead to the arrest and conviction of several members of a drug ring in the UK.

The arrests occurred after police in Wales discovered a photo on the messaging app on another person’s phone that showed man’s hand palm up, holding ecstasy tablets, according to the BBC. However, the parts of the two fingers visible in the photo didn’t fingerprints on record but discovered other information that linked the photo to one of the drug dealers.

Once the suspect was arrested, officers matched the fingerprints in the image to the suspects, the BBC said. The information eventually lead to 11 convictions earlier this month — convictions believed to be the first in Wales based on fingerprints taken from a cell phone photo, the BBC reported.

Dave Thomas, an officer involved in the investigation, said the photo highlights the importance of reviewing data stored on cell phones when investigating a crime.

“While the scale and quality of the photograph proved a challenge, the small bits were enough to prove he was the dealer,” Thomas told the BBC. “It has now opened the floodgates and when there is part of a hand on a photograph, officers are sending them in.”

WhatsApp didn’t immediately respond to a request for comment.

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