The CIU's forensic expert, Frankie is also an ex-con. He uses his book and street smarts to solve complex science based mysteries, as well as shed a light on the difficult lives their clients suffer behind bars. During his own incarceration, Frankie coped by studying the ins and outs of forensic science. He also developed a romantic relationship with his cellmate. This profound and meaningful connection will complicate Frankie's life.