BANGOR — A Bucksport high school student is facing charges of stalking and threatening a teenage girl online.

Police say 18-year-old Carl Astbury, a senior at John Bapst Memorial High School senior was arrested Wednesday for using a computer to stalk a fellow student.

He is charged with felony sexual exploitation of a minor as well as misdemeanor stalking and terrorizing.

Police started investigating after being contacted by the female student, who is under 18.

Police say Astbury demanded personal photos of the girl “or else.” He did not specify what that meant but police say it was “clearly a threat.”

He faces up to five years in prison if convicted.