GRAND RAPIDS, Mich. (AP) — Prosecutors preparing for the first prison sentence in an alleged plot to kidnap Michigan Gov. Gretchen Whitmer are loudly signaling to five other defendants that a key insider has shared extraordinary details about the operation.

Ty Garbin cooperated within weeks of being arrested, willingly putting a “target on his back to begin his own redemption,” the government said in a court filing.

Prosecutors want U.S. District Judge Robert Jonker to take that into consideration Wednesday when he sentences Garbin for conspiracy. The government is recommending a nine-year prison term, a long stretch but one that would be even longer if he had not assisted investigators after being charged.

The FBI last October said it broke up a scheme to kidnap the Democratic governor by anti-government extremists who were upset over Whitmer’s coronavirus restrictions. Six men were charged in federal court, while others were charged in state court with aiding them.

When the kidnapping case was filed, Whitmer pinned some blame on then-President Donald Trump, saying his refusal to denounce far-right groups had inspired extremists across the U.S.

The governor last year put major restrictions on personal movement and the economy because of COVID-19, although many limits were eventually lifted. The Michigan Capitol was the site of rallies, including ones with gun-toting protesters calling for Whitmer’s removal.

Whitmer exchanged barbs with Trump on social media, with Trump declaring in April 2020, “LIBERATE MICHIGAN!”

Garbin, a 25-year-old airplane mechanic, is the only federal defendant to plead guilty in the plot; the others are awaiting trial.

“He filled in gaps in the government’s knowledge by recounting conversations and actions that did not include any government informant or ability to record,” Assistant U.S. Attorney Nils Kessler said.

“Second, he confirmed that the plot was real; not just ‘big talk between crackpots,’ as suggested by co-defendants. Third, he dispelled any suggestion that the conspirators were entrapped by government informants,” the prosecutor said.

In his plea agreement, Garbin said the six men trained at his property near Luther, Michigan, constructing a “shoot house” to resemble Whitmer’s vacation home and “assaulting it with firearms."

Whitmer's office on Wednesday released portions of a victim impact statement she submitted to the court in June. She called the plot “terrifying" and expressed “enormous” gratitude to law enforcement. She said the threats haven't stopped and, for her, “things will never be the same.” Kidnapping plots and death threats endanger not just individuals but democracy, she said.

The governor said laws must be enforced but “there is room for grace and rehabilitation” for those who help “in unearthing the hate that has taken root in our society. ... I would like to acknowledge this defendant for taking responsibility, accepting the consequences of his actions and assisting in bringing others to justice.”

A Tennessee-based group called Parents for Peace said it helps people move away from extremist movements. It is asking the judge for a “minimal” prison sentence, noting that Garbin's rocky childhood and other factors contributed to his decisions.

The group's hotline has “received a significant increase in calls during the COVID-19 pandemic,” Parents for Peace said in a court filing. “Extremism has continued to be on the rise, and as more and more people were stuck at home, online and found their social networks broken, people turned to extremism.”

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White reported from Detroit.