SALEM (AP) — Just hours after Oregon Gov. John Kitzhaber announced his decision to resign, a subpoena arrived in a state office building confirming that federal agents are looking into the influence-peddling scandal that led to the abrupt end of a four-decade political career.

Oregon Gov. John Kitzhaber announced his resignation on Friday amid mounting questions and investigations into his fiancée, who was accused of using her position as first lady to enrich herself and benefit private consulting clients. Kitzhaber, 67, was elected to a historic fourth term as governor in November.