Linda H. Seymour was 35 when she was last seen at about 2:30 p.m. on December 21, 1982, in Northbrook, Illinois. She lived on Orchard Lane with her husband and two sons. Described as having brown hair, blue eyes and wearing thick brown‑framed eyeglasses, she also had a scar on her abdomen. She has not been seen or heard from since that afternoon.

Little has ever been released about the circumstances of her disappearance. Her husband later remarried and remained in the Orchard Lane home until his death in 2009; one of her sons eventually lived in the same house. In spring 2021 police and the North Regional Major Crimes Task Force excavated part of the backyard where a shed once stood, digging down to nine feet, but reported no human remains and said they had no further lines to pursue at that location.

Anyone who knew Linda, lived on Orchard Lane in 1982, or has information that could help should contact the Northbrook police.