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"Zone 7 is not a place.
It's a lifestyle"
- Sheryl 'Mac' McCollum
Swans Don't Swim in a Sewer
(2026)
When a serial killer’s daughter is brutally murdered, he asks Sheryl McCollum to team up to catch her killer.
A serial killer turns crime victim when his own daughter is the one viciously murdered. He asks law enforcement for help, but the case goes cold. Then he turns to Sheryl McCollum and the Cold Case Investigative Research Institute.
There’s never been a case like this in history.
Sheryl and her team of experts get involved, they hatch a plan. What happens when Sheryl uses a serial killer as bait to catch a killer?
ORDER NOW:
"A tale full of twists and turns about a crime scene investigator leaving no stone unturned"
Scott Duffy, FBI, (retired), Supervisory Special Agent
"One investigator can make all the difference in a cold case and Sheryl 'Mac' McCollum is the best there is!"
SGT. Joseph Giacalone, (retired) NYPD, Supervisor Detective Squad
"McCollum's intuition and investigative drive takes you on a journey that is both intense and spellbinding. It's a story you will never forget"
Aphrodite Jones, Bestselling author of Levi's Eyes
ABOUT SHERYL
Sheryl 'Mac' McCollum is a three-time Emmy Award nominated CSI from CSI Atlanta, a National Law Enforcement Officer Hall of Fame inductee, Director of the Cold Case Investigative Research Institute, Director of the Wildlife CSI Academy, a writer for CrimeOnLine, forensic and crime scene expert for Crime Stories with Nancy Grace, host of the award-winning podcast Zone 7, author of Swans Don’t Swim in a Sewer, and a working CSI for a metro Atlanta Police Department.
