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Phoenix man found not guilty of murdering ex-girlfriend, Kiera Bergman

In 2018, 19-year-old Kiera Bergman's body was found on the side of a Valley road. Her boyfriend, Jon Christopher Clark, has been found not guilty of her murder.

PHOENIX — A man accused of killing his ex-girlfriend after she vanished from her west Phoenix apartment has been found not guilty of her murder.

In September 2018, 19-year-old Kiera Bergman's body was found on the side of a West Valley road.  

The victim's on-and-off-again boyfriend, Jon Christopher Clark, was allegedly the last person to see Bergman alive.

On Thursday, a jury found Clark not guilty of second-degree murder and tampering with evidence.

Clark was accused of killing Bergman after an argument, then dumping her body near State Route 85 and Hazen Road.

On August 9, attorneys presented their opening statements, and prosecutors gave a timeline of events, including how suspicious activity on Bergman's cell phone after her death allegedly links Clark to the case.

"Kiera was just starting to write a new chapter," said one of the attorneys. "Jon Clark ended it. This was not an accident, this was not a suicide. Jon Clark is the one who ended Kiera's life story."

Clark's defense lawyers, though argued otherwise. They said the state only presented possibilities and insisted their client was not responsible for Bergman's murder.

"Jon is cooperating. He's the one who called 911 on the morning of August 6th. He's doing the things you would do to locate a missing person," said his attorney.

Clark sat quietly through the proceedings, including as Bergman's sister testified about the unusual circumstances surrounding her disappearance. 

"From the beginning, I felt uncomfortable with him," the sister said. "Just the way he put himself out there made me very uncomfortable, so I would limit what I would say to him."

Clark has previously denied any involvement in Bergman's disappearance. 

"I love Kiera with all my heart and would never do anything negative to her or put her in harm's way," Clark told 12News in 2018.

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