Last Witness by Jilliane Hoffman
Two years ago a brutal serial killer known as Cupid terrorized Miami, torturing and killing eleven young women. Sociopath William Bantling was arrested by police and Assistant State Attorney CJ Townsend put him on Florida's death row, where he waits to pay for the crimes with his life. But now a new terror stalks Miami Beach. Three cops are dead - savagely mutilated while out on patrol. The killer's apparently motiveless attacks horrify the public and leave law enforcement officials shaken. And when it becomes clear that all three dead cops worked on the Cupid investigation, it seems the killer has an even more terrifying agenda. CJ Townsend is worse than shaken. She shares a secret with three colleagues that may go right to the heart of this and the Cupid case - a secret that her colleagues have just taken to the grave. CJ knows that she must keep that secret from the law and her friends, from all scrutiny. But she also knows that to do so means she will be its only living witness - and perhaps the next to die.