You did this
(Book)

A sister's worst nightmare. A homicide detective's destiny. Everybody loves Claire's little sister, Tina. But only Claire sees the twisted psychopath hiding behind her sister's angelic face. When Tina is brutally murdered on her fourteenth birthday, the day Claire failed to walk her home from school, Claire never forgives herself. And neither does their mother. Twelve years later, more girls turn up dead in Newburgh exactly like Tina. Claire, now a police detective, suspects that her sister's murderer is still on the prowl. But the serial killer stumps the FBI forensic profiler assisting the case and Special Agent Robert Cline-Claire's old flame. When Claire becomes the lead suspect in the murder investigation, the system turns against her. Unable to trust anyone-not even herself-Claire must break every rule in the book to save the next girl. With time running out and family drama, a shocking discovery changes everything. Is Claire's sister truly dead-or is she playing one final lethal game?