PLATTSMOUTH, Neb. (AP) — Authorities are investigating the disappearance of a Plattsmouth, Nebraska, woman and her 11-year-old son. Plattsmouth police say Charlotte and Owen Schilling were last seen about 10 a.m. Thursday in the Plattsmouth area. They haven’t been heard from since. Police say Charlotte Schilling’s vehicle was found Friday near Lake Manawa, which is just across the Nebraska border near Council Bluffs, Iowa.