The Saratoga County Sheriff’s Office is investigating a crash killed a Northumberland man. It happened late Saturday night in the town of Northumberland . 42 year-old Zachary D. Yeager of Northumberland had been walking southbound on Route 32 just north of the hamlet of Gansevoort when he was struck by a 2005 Honda Accord and then vehicle. The driver of the Accord was arrested for DWI.