Prosecutors have dropped a criminal charge against a Cape Cod teen who they previously accused of planning a shooting at a Falmouth school, the Cape and Islands District Attorney’s Office announced Thursday.

Falmouth resident Ian Fotheringham , 18, pleaded not guilty to one count of threatening to use a deadly weapon in a public building during his arraignment in Barnstable District Court last week.

The charge against Fotheringham was dropped because prosecutors “learned of a discrepancy which made further prosecution in the District Court no longer available,” the district attorney’s office wrote in a press release. The discrepancy was discovered over the course of the investigation into the teen, which is ongoing.

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