Desperate Justice

Desperate Justice aka A Mothers Revenge is a 1993 American film starring Lesley Ann Warren, Bruce Davison, and Shirley Knight. It was based on the novel of the same name by Richard Speight, and the teleplay adaptation was written by John Bensink 1.

Later that day, Carol must cover for a comember of her womens club and host a club luncheon however, the luncheon runs late, leaving her unable to pick up Wendy whos staying after school to work on a science project. Since Bill is in Los Angeles for a meeting concerning his aforementioned business deal, Carol calls Jill at the record store where she works and asks her to pick Wendy up, but Jill inadvertently forgets about it untilminutes after she was supposed to be at Wendys school.However, once on the road, Jill runs into a traffic jam and doesnt get there until much later. Not finding Wendy anywhere on the school grounds, she hurries home and tells her parents the news Bill returns to the school with her, but they are still unable to find Wendy, and the police are called, who soon discover the presence of blood and suspect it might be hers. ........

Source: Wikipedia