In the two decades since JonBenét Ramsey was senselessly murdered, nearly every aspect of the case and the investigation has been picked apart by onlookers, desperate to find answers as to who is responsible for this horrible crime.

One of the most confusing pieces of the puzzle is the 911 call placed by the six-year-old’s mother, Patsy Ramsey, after she and husband John discovered their daughter was missing.

MUST SEE: Find out What JonBenét’s Ransom Note Revealed!

patsy and john ramsey

John and Patsy Ramsey.

The most contentious part of the tape is the end — when, allegedly, Patsy failed to fully hang up the phone and can be heard asking someone — many believe it’s her son, Burke — “Baby, what did you do? What did you do?”

Many believe that this is “proof” that Burke is responsible for his sister’s death, though he’s never been named a suspect and denied any involvement during a rare interview with Dr. Phil last fall.

MORE: Who Killed JonBenét? Get to Know the Most Compelling Theories

Last year, the 911 operator on the other line, Kimberly Archuleta, spoke out about the call, saying it was the “hardest call [she] ever took.”

“I think that’s because there was something inside me that said, ‘Something’s not right,’” she said, explaining that when Patsy failed to properly hang up, she heard what she believes to be another voice. “The third voice was a male voice… I knew there was a third, distinct voice.”

Kimberly stayed on the phone because she felt like Patsy’s behavior was unusual for someone who was reporting their young child missing.

“What bothered me immensely [after hanging up], it sounded like she said, ‘Okay, we’ve called the police, not what?’ And that disturbed me,” she said. “So I remained on the phone, trying to hear what was being said. It sounded like there were two voices in the room, maybe three different ones. I had a bad feeling about this. To me, it seemed rehearsed… That’s never changed.”

More from In Touch:

Find out What Laci Peterson’s Autopsy Revealed

Where Is Casey Anthony Now?

O.J. Simpson in Talks to Get His Own Reality Show Following Release

For access to all our exclusive celebrity videos and interviews – Subscribe on YouTube!