A man charged with assisting the leaders of a plan to kidnap Michigan's governor denied any role Monday but conceded he should have contacted police when talk turned to obtaining explosives. “It seemed to be getting serious,” William Null, 41, told jurors in a northern Michigan courtroom. Null, brother Michael Null and Eric Molitor are on trial in Antrim County, the last of 14 men charged in state or federal court since FBI agents broke up a kidnapping conspiracy against Gov. Gretchen Whitmer just weeks before the 2020 presidential election.