Brain-damaged woman at center of Wal-Mart suit

JACKSON, Missouri (CNN) -- Debbie Shank breaks down in tears every time she's told that her 18-year-old son, Jeremy, was killed in Iraq.

Even though the 52-year-old mother of three attended her son's funeral -- she continues to ask how he's doing. When her family reminds her that he's dead -- she weeps as if hearing the news for the first time.

Shank suffered severe brain damage after a traffic accident nearly eight years ago that robbed her of much of her short-term memory and left her in a wheelchair and living in a nursing home.

It was the beginning of a series of battles -- both personal and legal -- that loomed for Shank and her family. One of their biggest was with Wal-Mart's health plan.