CSI Alina Burroughs returns to her hometown in Florida to re-investigate a furniture store massacre that claimed four lives on Christmas Eve 1975. Applying new technology to old clues, Alina tries to piece together a puzzle still fraught with mystery. Should Tommy Zeigler, the longest serving Death Row inmate in Florida be set free?

CSI Alina Burroughs travels to Arizona to dig into the murder of 36-year-old single mother Kim Ancona. Marked in death by her killer's teeth, Alina uses the latest forensic technology to re-examine the case and use forensic odontology. Is a single bite mark enough to prove murder?

CSI Alina Burroughs travels to Michigan where Linda Stermer stands accused of killing her husband Todd by setting him on fire. Alina takes a closer look at the charred clues and uses cutting edge science to try to make sense of this enduring mystery. Linda's daughters are in her corner, while her son's want her to be sent back to death row.

CSI Alina Burroughs travels to Minnesota to explore the suspicious death of Jane Rhodes, a wife and mother who drowned during a 1996 vacation. Using new technology to analyze old clues, Alina tries to give the victim a voice from beyond the grave.

Michelle O'Connell's death by gunshot at age 24 isn't a big story in St. Augustine, Florida. The single mom with the troubled past seems to have ended her own life. But Michelle's outraged family is convinced law enforcement is ignoring all the signs of a brazen homicide for a very obvious reason... they're protecting one of their own.

CSI Alina Burroughs travels to Austin, TX, to investigate the 1988 murder of 20-year-old Pizza Hut worker Nancy DePriest; in the controversial case, Alina uses forensics to let the evidence speak for itself.

CSI Alina Burroughs travels to the Colorado mountains to investigate the 1995 shooting death of Bruce Dodson. Killed while hunting deer with his new wife, Alina relies on cutting edge ballistics analysis and forensic geology to try to pick up a murderer's trail.