A Highgate woman has been cited to appear in court on charges of aggravated assault and cruelty to a child following a months-long investigation into alleged abuse of an infant. Vermont State Police said Ashleigh Deyo, 23, of Highgate, was cited May 5 to appear in Franklin County Superior Court, Criminal Division, on May 6 at 1 p.m. The investigation began Jan. 6, when state police, working with the Northwest Unit for Special Investigations, the…