Showing Fatal Error by J. A. Jance

Richard Lowensdale is a cyber-sociopath who has left a trail of broken hearts in his virtual wake. When he is murdered, the women he once victimized are considered suspects. Brenda Riley, a friend of Ali's from her old news broadcasting days in California, turns out to be the prime suspect. Fearing a miscarriage of justice, Ali steps away from her new gig as the Yavapai Sheriff's Department media relations officer to go to her friend's aid--an act of kindness that puts her squarely in the sights of a remorseless killer.