Criminology Ph.D. student turned quadruple murder suspect Byran Kohberger returned to an Idaho courtroom Thursday as his defense lawyers claimed prosecutors turned over key evidence in discovery — but only in an altered form.

The defense is seeking additional evidence through discovery, including the full surveillance video that allegedly places Kohberger's white Hyundai Elantra near the crime scene.

"The public needs to know that they've withheld the audio," Anne Taylor, the Kootenai County public defender and Kohberger's lead defense attorney, revealed.

The claim came as Kohberger's team is vying to have his next discovery hearing open to the public, in opposition to the prosecution's request it happen behind closed doors.

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Kohberger

Bryan Kohberger, who is accused of killing four University of Idaho students in November 2022, sits with Anne Taylor, one of his attorneys, during a hearing in Latah County District Court in Moscow, Idaho, on Sept. 13, 2023. (AP Photo/Ted S. Warren, Pool)

Prosecutors, however, argued that everything in the proceedings related to the discovery hearing has been filed under seal and is expected to continue to be filed under seal.

"This is entirely inconsistent," Deputy Prosecuting Attorney Ashley Jennings told Judge John Judge during the hearing on Thursday. 

"The defendant will get his day in court, and the public will have a right to see what evidence the state has," Jennings said. "Now is not the time for that."

Furthermore, defense insinuations that prosecutors were dragging their feet on discovery are "utter nonsense," Latah County Prosecuting Attorney Bill Thompson said.

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Prosecutor Bill Thompson walks through the courtroom

Latah County Prosecuting Attorney Bill Thompson walks through the courtroom before a hearing Tuesday at the Latah County Courthouse in Moscow, Idaho.  (August Frank/Tribune, Pool)

Taylor accused prosecutions of trying to control public perception of the case by keeping evidence "in a vacuum."

"Bryan's the one with the right," Taylor argued. "It's his Sixth Amendment right to a public hearing."

Judge did not appear to be convinced by her line of reasoning.

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Idaho victims last photo

Madison Mogen, top left, smiles on the shoulders of her best friend, Kaylee Goncalves, as they pose with Ethan Chapin, Xana Kernodle, and two other housemates in Goncalves' final Instagram post, shared the day before the four students were stabbed to death. (@kayleegoncalves/Instagram)

"I totally understand that Mr. Kohberger has a constitutional right to a public trial, but having a hearing is not a trial," he said. "It's something different."

He said he might be more open to holding a closed-door hearing and then releasing information afterward.

Later, as the hearing grew heated, he chided both sides, urging them to "tone it down" and refrain from personal attacks on one another.

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Bryan Kohberger wears red jumpsuit as he walks into court house

Bryan Kohberger is seen for the first time since his arrest outside the Monroe County Courthouse in Stroudsburg, Pennsylvania. He's accused of the Moscow, Idaho, quadruple homicide. (The Image Direct for Fox News Digital)

The legal posturing could be a strategic move to bolster the defense team's effort to have the trial moved out of Latah County, where the murders took place, to a larger jurisdiction with more people in the jury pool, according to David Gelman, a New Jersey-based defense attorney and former prosecutor.

He said he agreed with Taylor — prosecutors should not have handed over an edited video that allegedly ties Kohberger's car to the crime scene.

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"They are trying to make the prosecutor out to be hiding evidence and going after an innocent guy," he told Fox News Digital. "They will say things in an open court that are off the wall probably but if the public sees it, that could help either move the case due to publicity or poison the potential jury."

Kohberger faces four charges of first-degree murder and another of felony burglary in connection with a Nov. 13, 2022, massacre at an off-campus house next to the University of Idaho.

The quadruple stabbing killed Maddi Mogen, 21, Kaylee Goncalves, 21, Xana Kernodle, 20, and Ethan Chapin, 20. 

University of Idaho victims Madeline Mogen, Ethan Chapin, Xana Kernodle, and Kaylee Goncalves

The victims of the University of Idaho murders, from left: Kaylee Goncalves, Ethan Chapin, Xana Kernodle and Madison Mogen. (Instagram @xanakernodle / @maddiemogen / @kayleegoncalves)

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According to court documents, police found a Ka-Bar knife sheath under Mogen's body that had Kohberger's DNA on it. They also traced his movements with phone pings and surveillance video of his car.

That evidence is favorable to the prosecution, Taylor argued, while little potentially exculpatory evidence has come out in court and both sides agreed to a restrictive gag order on the case which they have used to avoid answering questions from the press.

Judge entered not guilty pleas on Kohberger's behalf to all counts at his arraignment in May 2023.