Dark Truth by Mariah Stewart
Nina Madden was in college at St. Anselm's when her handsome professor father was arrested for the rapes and murders of several young co-eds whom he had been having affairs with. Nina accepted her father's guilt and moved on with her life.
Sixteen years later, Nina is a successful book editor in New York City when she discovers evidence that her father may not have been guilty after all. Along with good friend and author Regan Landry, Nina sets out to find the truth once and for all, placing her own life in danger as a result.
This is the third in the Truth Series.