Crime Lab Cold Case by Carol Ericson

Her latest corruption investigation is the key to catching the culprit.

FBI Agent Natalie Brunetti’s best friend disappeared fourteen years ago and no suspect was found. Now investigating past evidence tampering at the forensics lab — and contending with current lab manager and widowed single dad Michael Wilder — she vows to solve both mysteries. Michael, accused and cleared of his ex-wife’s cold case murder, doesn’t trust the nosy investigator. Until realising the evidence in his ex’s case might have also been compromised. But someone wants to keep the lab’s secrets and is willing to stop them by any means necessary...