Nineteen minutes - Jodi Picoult

http://en.wikipedia.org/wiki/Nineteen_Minutes

Sterling is an ordinary New Hampshire town where nothing ever happens-until the day its complacency is shattered by an act of violence. Josie Cormire, the teenage daughter of the judge sitting on the case, should be the state's best witness, but she can't remember what happened before her own eyes-or can she? As a trial progresses, fault lines between destroying the colsest of friendship and families..