Behind The Badge by Patricia Sargeant

She’s investigating a series of murders. He’s investigating her.

When rookie homicide detective Crystal Rashaad’s partner is murdered, it’s a chilling echo of a cold case that’s personal for her. This is her first big investigation, so she seeks guidance in profiling the killer from Special Agent Lucas Gilchrist. He’s eager to get close to Crys — because he’s trying to prove she’s a corrupt cop. Even as he searches for proof of her guilt, though, he’s drawn to her brilliance and boldness. Solving a string of homicides may be easier than winning Crys’s forgiveness when she learns Luke’s secret...