Silencer — Campbell Armstrong

When the US Federal Witness Protection Program fails to protect a star witness, a tough female former prosecutor risks her life to get answers in international bestselling author Campbell Armstrong's high-stakes thriller

Reuben Galindez's testimony helped put away brutal arms smuggler Ángel Sanchez, and he thought the trial would be the last time he'd ever have to deal with Sanchez again. Of course Sanchez's organization was looking for him, but Galindez wasn't alone; he had the US government, the FBI, and the Witness Protection Program to keep him safe.
 
When Galindez's body is found floating face-down in the river, riddled with bullets, former state prosecutor Amanda Scholes, who believed she'd put Sanchez in jail forever, is determined to find out what went wrong. Did the witness reveal his identity and leave the program? Did someone from inside Sanchez's organization track down Galindez? Or is his death the result of something far more insidious? Has someone managed to infiltrate the fortresslike security surrounding the program in order to exact revenge?