MONTPELIER, Vt. (AP) — A Vermont state assistant attorney general has been named interim replacement for a prosecutor who resigned because of post-traumatic stress disorder after responding to a fatal shooting of a state social worker.

Rory Thibault was sworn in by the governor on Tuesday. Scott Williams resigned Monday as Washington County state's attorney following the murder of a state social worker outside a state office building in Barre in 2015.

Williams has been on health-related leave since Nov. 15.

Republican Gov. Phil Scott says Thibault brings extensive experience to the role and will be a strong leader.

Thibault had previously served as Washington County's chief deputy state's attorney.

Scott says it's an interim appointment while he awaits recommendations from the county's Democratic committee.