276: Jonny Grusing – Serial Killer Con Man Scott Kimball

In this episode, retired agent Jonathan “Jonny” Grusing reviews his investigation into the activities of former FBI informant Scott Kimball, who has confessed to being a serial murderer. Grusing worked with the BAU, the FBI’s profiling unit, and numerous law enforcement agencies to bring homicide charges against Kimball and recover three of his victims from remote, mountainous areas.

Kimball was an FBI informant who manipulated law enforcement for twenty years, bringing investigators into his homicides while he learned about how the justice system worked. He has claimed to have murdered from 20 to 50 people, officials may never learn the truth. The details of his murders are horrific, revealing his deception, complete disregard for human life, including family members he claimed to love. Grusing continued the investigation following the sentencing to identify more potential victims of Kimball throughout the western United States until his Bureau retirement.

Grusing served in the FBI for 25 years. During his career, he worked violent crime, to include bank robberies, kidnappings, missing persons, serial rapists, serial killings, and special jurisdiction homicides.

In 2008, Jonny Grusing was named as the Behavioral Analysis Unit (BAU) Coordinator for Colorado, consulting on difficult or unusual homicides or missing persons cases throughout the state.

He is currently the Director of Safety and Security for the Douglas County School District in Colorado and managing his own investigative consulting service. He is writing on a book about his time spent with Scott Kimball while working on this serial murder case.






“So I go down and collect the cranium and collect the skeletal system and send it all to the FBI lab. I get Lori’s DNA and send that in. They do a cross section of the femur and guess whose DNA it was?”—Retired Agent Jonny Grusing

The following are links to articles and videos about serial killer conman Scott Kimball:

CNN – 7/2/2009: Suspected serial killer leads police to bodies, won’t be charged

Denver Post – 9/14/2010: Serial killer Kimball investigated in 2004 unsolved murder

Denver Post – 9/21/2018: Notorious Colorado serial killer charged in new murder and escape attempt

The Atavist Magazine – 5/2021: The Snitch

48 Hours Mystery: Hannibal unmasked

Click here to listen to more FBI Retired Case File Review episodes about serial murders.

The release form Scott Kimball wanted the mother of one of his victims to sign.
Jonny Grusing standing behind Scott Kimball (in white shirt) during a search for his victims in from remote, mountainous areas of Colorado and Utah.
Scott Kimball’s hand-drawn map of where Terry Kimball’s body was buried.
Skull of Terry Kimball recovered by Denver ERT from its hidden burial site.
Map showing the locations of where the bodies of three of Kimball’s victims were recovered from remote, mountainous areas in Colorado and Utah.





























Jerri Williams

View posts by Jerri Williams
Jerri Williams, a retired FBI agent, author and podcaster, jokes that she writes about the FBI to relive her glory days. After 26 years with the Bureau specializing in major economic fraud and corruption investigations, she calls on her professional encounters with scams and schemers to write police procedurals inspired by true crime FBI cases in her Philadelphia FBI Corruption Squad crime fiction series featuring flawed female FBI agent Kari Wheeler. Jerri’s FBI for Armchair Detectives nonfiction series enables readers to discover who the FBI is and what the FBI does by debunking misconceptions about the FBI in books, TV, and movies. Her books are available as ebooks, paperbacks, and audiobooks wherever books are sold. She’s also the host of FBI Retired Case File Review, a true crime podcast with more than 300 episodes available on all popular podcast apps and YouTube.

1 Comment

  1. […] He is currently the Director of Safety and Security for the Douglas County School District in Colorado and managing his own investigative consulting service. He is writing on a book about his investigation of serial killer and former FBI informant Scott Kimball, which he reviewed in FBI Retired Case File Review Episode 276. […]


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