The Witness - Sandra Brown

From a New York Times bestselling author, a public defender must protect herself and her young son after stumbling upon a chilling secret.
After narrowly escaping a deadly car crash, Kendall Deaton and her son find refuge in a small South Carolina town. But their relief is short-lived when Keaton makes a terrifying discovery. The town of Prosper isn't so innocent after all.
Now, Kendall is a reluctant witness intent on escaping from an insidious evil-and a community that will stop at nothing to protect what is "theirs".