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The parents of Bryan Kohberger, Michael and Maryann Kohberger, were called to testify in front of a Pennsylvania grand jury this week in connection with the May 2022 disappearance of a woman found dead in April, according to local reports.

Dana Smithers, 45, was last seen leaving a friend's house in Monroe County the evening of May 28. 

Almost a year later, her remains were recovered in Stroudsburg – a Poconos community about a 30-minute drive from the Kohberger family home in Albrightsville.

However, the Stroud Area Police Department said Thursday that investigators had discovered zero evidence linking Kohberger to Smithers' death. 

IDAHO MURDERS: BRYAN KOHBERGER'S ARREST RESURRECTS COLD CASES IN REGION

Bryan Kohberger enters the courtroom

Bryan Kohberger enters the courtroom, looking at defense attorney Anne Taylor, for his arraignment hearing in Latah County District Court, Monday, May 22, 2023, in Moscow, Idaho. Kohberger is accused of killing four University of Idaho students in November 2022. (Zach Wilkinson/Pool via REUTERS)

"The SARPD has NO EVIDENCE that Dana Smither’s disappearance, is in ANY WAY tied to Idaho murder suspect Bryan Kohberger," the agency wrote on Facebook.

And the suspected killer has a "good alibi" in Smithers' case, according to the Wilkes-Barre-based WBRE/WYOU, citing a source close to the case.

Bryan Kohberger in driver seat

Bryan Kohberger was stopped by Indiana police Dec. 15, 2022 before he was identified as a suspect in the murder of four University of Idaho students. His father Michael Kohberger, left, went on a cross-country drive from Washington to Pennsylvania with him in the suspect vehicle. (Hancock County Police Department)

In Idaho a grand jury recently returned an indictment on four charges of first-degree murder and another of felony burglary for allegedly breaking into the King Road rental home to kill Madison Mogen, Kaylee Goncalves, Xana Kernodle and Ethan Chapin.

Kohberger began a Ph.D. program at Washington State University in the fall of 2022. The school is about 10 miles from the University of Idaho, where he is accused of brutally stabbing four undergrads at 4 a.m. on Nov. 13.

IDAHO MURDERS: BRYAN KOHBERGER'S DEFENSE STANDS SILENT AT ARRAIGNMENT, JUDGE ENTERS NOT GUILTY PLEAS

All four students had been stabbed multiple times, according to Latah County Coroner Cathy Mabbutt – and at least some of them were likely sleeping at the start of the 4 a.m. massacre.

Despite the horrific allegations and a past drug problem, Kohberger had a squeaky clean record prior to his arrest on Dec. 30 at his parents' house – after a cross-country drive home from WSU with his dad in the suspect vehicle. 

WATCH: Bodycam video shows traffic stop in Indiana involving Idaho murder suspect Bryan Kohberger

However, his arrest soon led investigators in several local communities to look for potential links to unsolved cases nearby.

Father of Bryan Kohberger

Bryan Kohberger's father, Michael Kohberger, exits Monroe County Courthouse in Stroudsburg, PA on Jan. 3, 2023 after his son's extradition hearing. His son is charged in the November quadruple homicide of University of Idaho students. (The Image Direct for Fox News Digital)

"One thing about cold cases is you always look to see if your case is connected to any others, and the reason behind that is many times those cases will hold clues for each one," said Joseph Giacalone, a former NYPD sergeant who was the commanding officer of the Bronx Cold Case Squad from 2007 to 2009. "If you can put them all together, you can put together the entire package."

Woman in a plaid shirt and face mask clutches her coat and a box of tissues

Amanda Kohberger, sister of Idaho murders suspect Bryan Kohberger, is spotted exiting Monroe County Courthouse in Stroudsburg, Pennsylvania, on Jan. 3, 2023. Her brother is charged with murdering four University of Idaho students. (The Image Direct for Fox News )

However, the professor at John Jay College of Criminal Justice noted that not all cases turn up links — because not every suspect is a serial offender.

At his arraignment on the murder charges in Idaho's Latah County Monday, Kohberger declined to enter a plea.

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

The victims of Nov. 13 University of Idaho massacre, from left to right: Kaylee Goncalves, Ethan Chapin, Xana Kernodle and Madison Mogen. (Instagram @xanakernodle / @maddiemogen / @kayleegoncalves)

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District Judge John Judge entered not guilty pleas on all counts on his behalf, scheduling an October trial.

Kohberger is being held at the county jail next door without bail in the meantime. If prosecutors choose to seek the death penalty, they have 60 days from Monday to formally notify the court.