Wrong Place Wrong Time

Above average reverse chronology mystery/suspense novel in which the MC keeps traveling back in time after seeing her 18 year old son murder a stranger. As Jen travels days, weeks, and even years into the past, she picks up clues and nuances she missed the first time around. But when will she stop moving backwards, and is she doing enough so that the son she left in 2022 will not commit a horrible crime?

I'm not usually a fan of books labeled as suspense or thrillers, but the unique structure and insightful, determined heroine made this a rare and welcome exception.