A former FBI agent believes investigators should explore new possible angles in the mysterious disappearance of Nancy Guthrie.
Jonny Grusing spent 25 years with the FBI’s Denver Field Office, where he investigated violent crimes, missing personserial killers and more. He is also the author of “The Devil I Knew: Uncovering a Serial Killer,” which chronicles the true crime case of Scott Kimball.
Gruss made it clear that he was operating only on information that had been made public in the case, and that he proposed a new theory in case it might jog the memory of members of the public who could help solve the case.
“The first thing he did was put his gloves on, put his gloves on and it didn’t look like he was trying to grab [the camera] Go away,” Gruss said of the suspect’s behavior on Guthrie’s porch. “It looked like he was trying to cover it with his right hand. “Then he lowered his head, looked around, found the branch, and placed it in front of it. “
Photos posted on February 10, 2025 show a “theme” on Nancy Guthrie’s property.
(Fox News)
“Since we don’t have audio, is it possible that he knocked on the door loudly, or pressed the doorbell, [that] He’s trying to get Nancy to open the door, and he’s protecting himself from being seen as the masked man, so she opens the door in confusion? “Gruss asked rhetorically.
FBI releases new suspect details in Nancy Guthrie disappearance, including backpack; reward doubled to $100,000
Read it on the Fox News app
If that’s the case, Gruss said, the suspect likely wasn’t there to rob the house. Because Guthrie lived in a sprawling residential neighborhood, Gruss also thought it was unlikely the suspect was a robber who accidentally showed up at the wrong address.
Instead, he said, the suspect may have been there because he had a personal vendetta against Guthrie and may have lured her from the home onto the porch.
There appear to be drops of blood on the front door of Nancy Guthrie’s home on Tuesday, February 3, 2026, in Tucson, Arizona. Guthrie was last seen Saturday night.
That possibility makes more sense considering blood was found on Guthrie’s front porch and driveway, and authorities have not released any information about whether blood was found inside the home, Gruss said.
Nancy Guthrie case: FBI braces for ‘parallel reality’ as it awaits DNA results
The suspect was also wearing what was believed to be a cheap Walmart holster and wore it on the front of his body, which Gruss said was “not tactically sound.” Gruss also believes it would have been difficult for the gunman to fire while wearing gloves, and that the gun may have been a prop to instill fear in Guthrie.
“So if the gun was a prop, if he was protecting himself from being seen, if he was actually ringing the doorbell or knocking on the door for her to come, I think he wanted to confront her,” Gruss said.
Gruss always believed something went wrong in any interaction Guthrie had with the suspect, leading him to remove her from the home. He said maybe Guthrie recognized him and caused panic. He also said the kidnapping-for-ransom theory does not hold water because the alleged kidnappers never directly contacted the Guthrie family.
Possible tattoos featured in Nancy Guthrie video could help identify subject, former analyst says
Complaints don’t speculate on what sort of beef someone might have with Guthrie, or why they might.
But he wants the public to consider the possibility in case they remember someone who said they were wrongly accused by someone who fits Guthrie’s description.
FBI agents search Nancy Guthrie’s home in Tucson on Friday, February 6, 2026. Guthrie was last seen Saturday night as the investigation into her disappearance continues.
Click here to download the Fox News app
“It’s hard to be an expert in human behavior because it’s so unique to one person,” Gruss said, despite a quarter century of experience.
“You know, I’m just trying to use the experience of different cases and try to apply any type of logic to this in the hope that someone in the public who thinks this could be someone they know, whether it’s a family member or a current co-worker or a friend or a partner or whatever, puts the puzzle pieces together and says, ‘Yeah, now I think it could be him.'”
Original source of the article: Former FBI agent offers new theory about Nancy Guthrie’s disappearance: ‘Personal grievance’