Inside the Boston Strangler Case: Casey Sherman on Mary Sullivan, Albert DeSalvo, and What Still Does Not Add Up

Inside the Boston Strangler Case: Casey Sherman on Mary Sullivan, Albert DeSalvo, and What Still Does Not Add Up

March 25, 2026 · 34 min · Season 119 · Episode 1

About this episode

Sheryl McCollum interviews Casey Sherman about the Boston Strangler case and the unresolved questions surrounding his aunt's murder.

In this week’s episode of "Zone 7 ," Sheryl McCollum talks with author and investigative reporter Casey Sherman about the murder of his aunt, Mary Sullivan, long believed to be the final victim of the Boston Strangler, and the lasting impact her murder had on his family. Casey explains why his family has long questioned the official story, pointing to evidence that, in his view, complicates what many people think they know about the case. Their conversation touches on DNA analysis, missing confession tapes, and alternate suspects that Casey believes raise serious questions about Albert DeSalvo’s role in the murders. Guest Bio Casey Sherman is a New York Times bestselling-author and investigative reporter known for revisiting major crimes and historic tragedies. He is the author of  " A Rose for Mary ," which examines the murder of his aunt, Mary Sullivan, and the lingering questions surrounding the Boston Strangler case. About the Host  Sheryl “Mac” McCollum  is an active crime scene investigator for a Metro Atlanta Police Department and the director of the Cold Case Investigative Research Institute, which…

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