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When four mothers in Southern California finally had their kids in school full-time, they didn’t turn to Pilates or pickleball. Instead, they became The Carpool Detectives — and decided to investigate a murder.

Their story unfolds in The Carpool Detectives: A True Story of Four Moms, Two Bodies and One Mysterious Cold Case (Random House), written by Chuck Hogan, the New York Times bestselling author known for The Town and co-author of The Strain trilogy with Guillermo del Toro.

Hogan details how four friends — Marissa Pianko, Nicole Landset Blank, Samira Poulos, and Jeannie Wilkinson — solved a gruesome double homicide that had eluded veteran law enforcement for more than a decade.

From School Drop-Off to Cold Case Sleuthing

The case began with the 2005 discovery of a suburban businessman and his wife, found near their wrecked SUV in a Los Angeles County canyon. Millions of dollars were missing, their family business shuttered, and the police had no leads.

In 2020, Pianko — a former forensic accountant — learned about the case in a UCLA journalism class. She quickly became obsessed. Eventually she recruited her friends: a political opposition researcher, a digital advertising project manager, and a freelance writer.

The group started cold-calling family members, interviewing retired detectives, and scouring police files.

A Mother’s Instinct Becomes a Superpower

“Their ability as women to get people to trust and confide in them — was their superpower,” Hogan writes. “Motherhood no longer defined them — it was one of many hats they wore.”

Their work uncovered startling clues: overheard arguments, fraudulent invoices, and a suspicious company shutdown within a week of the couple’s disappearance. The victim’s daughter — the only family member seeking justice — gave the team her parents’ cell phones for analysis.

Danger and Discovery

The deeper they dug, the more dangerous it became. “Our main suspect called my cell phone when I was making a PB&J sandwich for my kids and asked why I was digging into him. I felt the blood drain out of my body,” Pianko told The New York Post.

Ultimately, the moms uncovered evidence pointing to a mob hit tied to organized crime’s takeover of the family business. Their findings helped reopen the case and identify two mobsters implicated in the fraud and killings.

What’s Next for The Carpool Detectives

The women are now investigating another cold case — the murders of roughly 20 women in the 1970s and 1980s, possibly by a serial killer. As Pianko told MSN, the new case feels safer because it’s further removed in time: “Our first case was sometimes too close for comfort.”