Slain NJ mother 911 call made by her husband has forensic expert warning one mistake could derail focus

A haunting 911 call placed by the husband of New Jersey mother and psychotherapist Brooke Hanlon has been widely shared online, drawing intense scrutiny from internet users looking for possible clues.

The emotional and unsettling audio includes graphic details about the scene Conor Hanlon described after discovering his wife covered in blood.

Brooke Hanlon, 35, was found fatally stabbed inside her home in Chester, New Jersey, on June 6. Authorities have not announced any charges in connection with her death, and Conor Hanlon has not been accused of any crime or wrongdoing.

INC News tried to contact Conor Hanlon for comment, but calls were not immediately returned.

Portrait of Brooke Hanlon, victim found stabbed to death in her New Jersey home.

Brooke Hanlon was discovered stabbed to death at her New Jersey home, leading local authorities to open a homicide investigation. (Facebook/Meta)

After the 911 recording became public, online speculation grew over who may be responsible. However, one of the country’s leading forensic linguists is urging people following the case to avoid drawing premature conclusions.

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“You can’t tell from a 911 call,” Dr. Robert Leonard, a forensic linguist and Hofstra University professor, said to INC News.

“People very often try to,” he goes on to say.

brooke-hanlon-murder-husband-fox-news_004

Conor Hanlon leaves a residence in Massachusetts on Thursday, July 9, 2026. Hanlon is the widow of Brooke Hanlon, who was found dead in their home in New Jersey in June. ( )

Leonard’s blunt breakdown comes amid social media speculation. 

Internet sleuths are dissecting Hanlon’s frantic tone of voice and his word choice, like referring to one of Brooke’s wounds as a “laceration” in the nearly seven-minute call.

Portrait of Brooke Hanlon with her sister

Brooke Hanlon, whose death was ruled a homicide, was found at her New Jersey home in June 2026. (Paige Haggerty)

That’s exactly the kind of analysis that has led to devastating mistakes, Leonard said.

He pointed to multiple murder investigations where innocent people were publicly vilified because of how they sounded while calling 911.

One case he references is that of the father of Isabel Celis, Sergio Celis. He reported his 6-year-old daughter missing from their Tucson, Arizona, home in 2012.

Investigators discovered her remains five years later; leading up to this discovery, Celis was branded a killer, Leonard says.

“For six years all of the supposed amateur experts said he did it,” Leonard said.

Ultimately, Christopher Clements , a convicted sex offender, was also convicted of young Isabel’s murder and kidnapping.

In another notorious case, then-teenager Marty Tankleff, of Long Island, New York, spent 17 years in prison, wrongfully convicted.

Prosecutors zeroed in on his alleged calm demeanor following the killings of his parents; that conviction was eventually overturned.

“Everybody is so different,” Leonard said. “There are no reliable markers.”

split image shows Brooke and friend Jennifer posing for two separate photos

Brooke Hanlon’s former best friend and Boston roommate, Jennifer Payne, remembers the relationship between the slain New Jersey therapist and her husband, Conor Hanlon. (Jessica Payne)

He goes on to say, “We should not rush to judgment.”

As for the call itself, he said, “You don’t do a murder investigation with one bit of data.”

The investigation into Brooke Hanlon’s killing is ongoing, The Morris County Prosecutor’s Office is leading the investigation.

There is a $1,000 reward for anyone who can provide information in the case.

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