DETROIT — Two of the men convicted of plotting to kidnap Gov. Gretchen Whitmer hired a private investigator to go to a juror’s workplace and investigate the juror’s potential bias, according to a newly unsealed court filing.

The men — Adam Fox and Barry Croft Jr., who were found guilty last month of planning to kidnap the governor over her COVID-19 policies — hired the investigator to track down the juror’s coworkers to determine if the juror was biased against them. The investigation was part of a broader effort by their defense attorneys to get a new trial.

The defense long maintained this was a case of entrapment and vowed a vigorous appeal, which right now appears to focus on a potentially problematic juror who surfaced on the second day of the trial. The juror was allowed to stay on the case after the judge interviewed the person and concluded there was no proof of bias.

A misconduct tip was initially made by one of the juror’s coworkers who claimed the juror wanted to be part of the jury and intended to “hang” the defendants if picked, court filings show. But the information was second-hand. The defense hired an investigator to examine the juror and find first-hand information from the juror’s colleagues. 

The investigator tracked down two coworkers who made new allegations against the juror. But the person who allegedly heard potentially bias statements first hand won’t speak, court records show. 

Still, the defense suspects foul play and argues a new trial is warranted “based on the misconduct of and the appearance of judicial bias which impacted the proceedings.” 

Fox and Croft are scheduled to be sentenced in December.

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Assistant U.S. Attorney Jonathan Roth delivers opening statements in the trial of four men charged with plotting to kidnap Gov. Gretchen Whitmer as Chief U.S. District Judge Robert Jonker looks on from the bench.

How allegations of juror misconduct unfolded in the Whitmer trial

In seeking a new trial Tuesday, the defendants asked the judge for a so-called Remmer hearing — a proceeding to determine whether juror bias occurred. That filing was initially sealed, as required under a prior court order, though U.S. District Judge Robert Jonker unsealed it Thursday, with redactions.

The identity of the juror remains confidential.

On Aug. 10, the day after opening statements, the defense got a tip from a juror’s co-worker that the juror had been telling people at work that  they were hoping to get on the Whitmer trial, and intended to “hang” the defendants if picked.

That evening, the defense informed the judge about the allegation and asked if they could interview the juror, though the judge refused.

Instead, the judge spoke to the juror privately in his chambers — along with two court staffers — in a seven-minute interview that ended with the judge concluding the juror was not biased and could continue to hear the case. The juror denied telling coworkers they believed the defendants were guilty. The judge took the juror at their word.