COLUMBUS, Ohio — In the confines of a Knox County Sheriff’s Office interrogation room, Detective Joe Dietz confronted one of Ohio’s darkest killers, Matthew Hoffman.

For three days, the former Bureau of Criminal Investigation detective, along with sheriff’s deputies and a member of the FBI pressed Hoffman for answers about the deaths of Tina Herrmann, her 11-year-old son Kody Maynard and family friend Stephanie Sprang. The three had vanished, presumed dead, and only Hoffman knew where their bodies were.

“Tell me where they're at, Matt,” Dietz pressed during an interrogation video obtained by 10TV.

Hoffman’s killing spree played out in the otherwise quiet Knox County home of Herrmann, a house he had stalked from the woods across the street.

Credit: Knox County Prosecutor's Office

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