The Winnebago County Sheriff's Office is investigating a deadly crash that was reported Wednesday after 6 p.m.It happened on Highway 21 west of Leonard Point Road in the Township of Algoma.Authorities say a 30-year-old Berlin man was driving a pick-up truck when he collided with an Amazon delivery van that was driven by a 30-year-old Appleton woman.The pick-up truck caught on fire after the crash, and although the man was pulled from the vehicle, he died at the scene.