PROSECUTORS have revealed a list of potential witnesses for the trial of a man who spoke to Libby German just hours before she was killed.
Libby, 14, and Abigail Williams, 13, were found dead in 2017 after the pals went for a walk on the Delphi Historic Trails in Indiana.
Richard Allen, 50, has been charged with two counts of murder in the killings of the teen girls.
He denies any involvement in the girls' deaths and pleaded not guilty.
Allen is the only suspect to be officially named by cops - but other people of interest have previously been investigated in connection with the deaths of Libby and Abby.
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Kegan Kline, an alleged online catfish and accused pedophile who was in communication with Libby through a bogus Snapchat account in the days before her death, has been linked to the case.
Kline has never been named as a suspect in the Delphi case.
But he was charged with 25 counts related to child pornography and exploitation not connected to the Delphi case after having five child porn-related charges dismissed in November 2022.
His trial is set to begin on May 10.
Investigators have now revealed its list of 19 potential witnesses.
The list includes law enforcement investigators, a reporter, Kline's father, Jerry Kline, two former friends, and an alleged victim.
The male model, whose images were used Kline's fake profile, is also named on the list.
Kline’s ex-girlfriend and an Alaska police officer are also on the list.
Kevin Greenlee, host of The Murder Sheet, said: "This witness list is basically not a final product.
"There may be other people called who are not on the list and also its not even a guarantee that everybody who is on that list will actually be called."
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During a police interview in 2020, Kline admitted communicating with Libby - but denied any involvement in the murders.
In an exchange with another teenager the day after learning the girls had been murdered, Kline revealed he had plans to meet Libby on the Monon High Bridge but she "never showed".
Police quizzed Kline on the plans during an interview in August 2020.
Detectives accused Kline of searching on his phone for reports about the case, searching "how long does DNA last", and looking up other infamous murder cases, including OJ Simpson and JonBenét Ramsey.
In August, he was temporarily released into the custody of Indiana State Police, who were conducting a search of the Wabash River - believed to be linked to the Delphi investigation.
The search lasted several weeks. Police never confirmed what they were searching for, but Allen was taken into custody not long after the search concluded.
It's never been revealed how Libby and Abby were killed, though the two girls' bodies were reportedly "posed" and items of clothing had been taken from them as trophies.
An affidavit unsealed by a judge late last year revealed that an unspent .40 bullet found between the bodies of the two girls appeared to have been cycled through a pistol owned by Allen.
The documents also revealed that Allen admitted to being on the bridge at the same time the girls were killed in two separate interviews, including one in 2017.
Prior to the affidavit's release, prosecutors had pleaded with a judge to keep its contents out of public view, insisting they had "good reason" to believe Allen may not have acted alone.
