A 19 year old Newtown resident died after his car went off Interstate-84 westbound in Southbury late Saturday night. State police said Spencer Jorgenson’s Honda Prelude hit a guardrail near exit 15, then went down an embankment. Jorgenson, the only person in the car, died from his injuries. The crash happened just before midnight. The highway was temporarily closed during the investigation. Anyone with information is asked to contact state police.