5 Arrests—but Isabelle Johnson Is Still Wanted for the Murder of Jason Coulthart

Forty-three-year-old Jason Christopher Coulthart disappeared from Niceville, Florida, in May 2026. One month later, investigators found his remains buried beneath concrete at a property in Freeport.

Five people have since been arrested, but Isabelle Rose Johnson—the woman wanted on an open count of murder in Jason’s death—remains at large. Authorities believe she may be changing her appearance, using aliases, and receiving help from others. A reward of up to $16,000 is available for information leading to her arrest.

Isabelle is considered dangerous. Do not approach her or post a possible sighting online before contacting law enforcement.

Walton County Sheriff’s Office: 850-892-8111
Emerald Coast Crime Stoppers: 850-863-TIPS (8477)
Anonymous tips: https://emeraldcoastcrimestoppers.com/
You may also use the P3 Tips app or call 911 if you see her.

All charges and descriptions of alleged conduct remain allegations unless proven in court.

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Sources

https://waltonso.org/wcso-searching-for-isabelle-johnson-wanted-on-an-open-count-of-murder/

https://x.com/WCSOFL

https://x.com/WCSOFL/status/2075703315279577333

https://www.facebook.com/nicevillepd/posts/1473598948141484/

https://nwscorrections.waltonso.org/NewWorld.InMateInquiry/WaltonCounty

https://emeraldcoastcrimestoppers.com/

https://www.mclaughlintwincities.com/obituaries/Jason-Christopher-Coulthart?obId=49019127

https://weartv.com/news/local/police-searching-for-man-reported-missing-in-niceville-on-may-24

https://www.wjhg.com/2026/07/09/remains-found-freeport-property-identified-missing-niceville-man/

https://www.wjhg.com/2026/07/10/search-continues-wanted-murder-suspect-isabelle-johnson/

https://www.wjhg.com/2026/07/11/two-more-arrested-connection-walton-county-murder-investigation/

https://www.wjhg.com/2026/07/21/up-16k-reward-offered-tips-leading-arrest-isabelle-johnson/

https://www.wjhg.com/2026/07/23/wcso-releases-new-details-help-identify-murder-suspect/

https://www.wjhg.com/2026/07/31/wcso-releases-new-photo-search-murder-suspect-isabelle-johnson/

https://weartv.com/news/local/woman-wanted-for-murder-in-walton-county-3-charged-with-accessory-to-murder

https://www.local10.com/news/florida/2026/07/13/detectives-ask-public-for-help-with-finding-fugitive-wanted-for-niceville-mans-murder/

https://people.com/missing-florida-man-body-found-shallow-grace-search-continues-woman-accused-murder-12016556

https://people.com/woman-on-run-accused-of-murder-after-body-found-in-shallow-grave-12023155

https://abcnews.com/US/suspected-murderer-disguises-multiple-identities-run-authorities/story?id=134986417

https://www.fox5atlanta.com/news/why-reward-florida-murder-suspect-just-jumped-16k