John Dedering

Calumet County Investigator John Dedering was discussed in Steven Avery's trial through accounts of the missing-person investigation and the statements he collected. He worked with other investigators at the Zipperer residence, received oral and written statements after Teresa Halbach's vehicle was found, and helped sort burn-barrel contents. Witnesses reviewed a statement or reports associated with Dedering when questioned about their recollections and earlier accounts; cross-examination also examined whether giving statements affected one witness's attention to the vehicle. In Brendan Dassey's trial, an agent identified Dedering as a member of the March 1 garage-search team but did not specify his tasks.