Jason Christopher Coulthart

April 2020

• Isabelle Rose Johnson faces drug-related charges and a failure-to-appear charge.

August 2025

• Johnson faces additional drug-related charges.

December 2025

• Johnson is charged with driving with an expired license or without a valid driver’s license.

May 24, 2026

• Jason Christopher Coulthart, 43, is last seen leaving the College Condominiums on East College Boulevard in Niceville, Florida.
• Jason is described as approximately 5 feet 8 inches tall and 150 pounds, with brown hair and hazel eyes.
• He is reported missing to the Niceville Police Department, which begins investigating his disappearance.

June 2026

• Johnson faces charges involving stolen property and possession of methamphetamine.

June 18, 2026

• The Niceville Police Department issues a public missing-person appeal requesting assistance locating Jason. Source
• Police report that Jason has not been seen since leaving the College Condominiums on May 24.
• The case continues to be publicly presented as a missing-person investigation.

June 24, 2026

• According to allegations later documented in Walton County Sheriff’s Office arrest reports, Isabelle Rose Johnson complains that Jason Christopher Coulthart is aggravating or irritating her.
• A witness reportedly tells investigators that Johnson discussed “getting rid” of Jason.
• The witness also alleges that Jason had threatened to interfere with Johnson’s custody of her children.
• Investigators allege Johnson killed Jason by tightening a large white zip tie around his neck.
• Johnson’s roommate, Bobbie Gean Wagstaff, allegedly assisted Johnson in digging a shallow grave on property off Sunset Lane in Freeport, Florida.
• Jason’s body is allegedly placed in the grave.
• Concrete is placed over the burial site. According to a witness account, Johnson said the concrete was intended to prevent a dog from uncovering the body again.
• A black Cadillac is parked over the burial location to further conceal the grave.
• The exact date Jason was killed and buried has not been publicly established.

June 25, 2026

• According to allegations later documented in Walton County Sheriff’s Office arrest reports, Isabelle Rose Johnson complains that Jason Christopher Coulthart is aggravating or irritating her. Source

  • Niceville police immediately notify the Walton County Sheriff’s Office because the property is within Walton County’s jurisdiction.

  • The Walton County Sheriff’s Office Criminal Investigations Bureau submits an application for a search warrant.

  • The search warrant is approved that same day.

  • During the evening, investigators execute the search warrant and find Jason’s body buried in a shallow grave.

  • The District 1 Medical Examiner’s Office responds to assist with the recovery, examination, and identification of the remains.

  • Allegations later documented in arrest reports state that the grave was covered with concrete and concealed beneath a parked black Cadillac.

  • A large white zip tie is reportedly found around Jason’s neck.

  • The remains are not immediately identified publicly.

  • The discovery changes the investigation from a missing-person case to a homicide investigation.

  • Investigators identify Isabelle Rose Johnson, 38, as the suspected killer.

  • Authorities later allege Michael Ray White and Kathleen Morris begin helping Johnson hide in the Santa Rosa Beach area after the remains are discovered

June 26, 2026

• 12:04 p.m. Walton County Sheriff’s Office Criminal Investigations Bureau received information Thursday regarding the possible location of a homicide victim. Investigators gathered evidence, and a judge signed a search warrant Thursday evening. Source
• Shortly after executing the search warrant on the property, human remains were found. All parties involved have been identified and are known to each other, and one individual is currently in custody.
• A warrant is issued for Johnson on an open count of murder in connection with Jason’s death.
  • Johnson is not located and becomes a wanted fugitive.
  • Authorities believe she is receiving assistance from people who know she is wanted for murder.
  • This is an active investigation. Certain details are being intentionally withheld at this time to protect the integrity of the case.

June 29, 2026

• Bobbi Wagstaff, 31, of Sunset Lane has been arrested and charged with accessory to capital murder after the fact and possession of methamphetamine. Source

  • Investigators allege Michael Ray White provides Johnson with shelter while she is wanted. White allegedly misleads investigators by denying that he knows Johnson.

    Kathleen Morris allegedly transports Johnson, obtains supplies for her, and helps conceal her whereabouts. Investigators allege White and Morris exchange communications concerning Johnson’s movements and efforts to avoid law enforcement.

    Johnson is recorded on surveillance video inside a business in Destin several days after Jason’s remains are recovered. The footage captures Johnson’s appearance, voice, and mannerisms. Authorities later warn that Johnson may have altered her hair, clothing, and overall appearance after the recording was made.

    Martin Leaverton and Sandra Leaverton allegedly retrieve backpacks and other belongings for Johnson. The couple allegedly provides Johnson with a cellphone and transports her on multiple occasions.

    Arrest-report allegations state that Johnson flees from deputies during one encounter. The Leavertons allegedly continue assisting her after learning that she is wanted for murder and attempt to help her leave Florida or obtain refuge outside the state.

    The Walton County Sheriff’s Office publicly identifies Johnson as wanted in connection with the homicide investigation. Authorities announce that one person is in custody and that Johnson remains at large.

    Johnson is described as 38 years old, approximately 5 feet 3 inches tall and 120 pounds, with brown hair and hazel eyes. Law enforcement warns that she should be considered dangerous and should not be approached.

July 1, 2026

July 2, 2026

• Investigators determine that Johnson may be using several aliases while evading law enforcement. The known or suspected aliases include Source

Harley, Jessica Elaine Bowman, Jessica Elaine Thrush, Jessica Elaine Thrash, Jessica Dowdy, and possibly Denise.

• Authorities identify Johnson’s connections to Walton and Okaloosa counties in Florida, lower Alabama, and several areas of Georgia.
• Investigators warn that Johnson moves frequently and may persuade people to help her by claiming she is experiencing domestic violence or another personal hardship.
• Authorities believe she may have cut or dyed her hair to change her appearance.
• Members of the public are instructed to call 911 rather than approach her.

July 9, 2026

• Morning: The Walton County Sheriff’s Office and Niceville Police Department receive confirmation through DNA testing that the remains recovered from the Sunset Lane property belong to Jason Christopher Coulthart.
  • The District 1 Medical Examiner’s Office positively identifies the remains.
  • The identification formally connects the Freeport homicide investigation to the Niceville missing-person case.
• 6:05 PM The Walton County Sheriff’s Office publicly announces that the human remains found buried on the Freeport property have been positively identified as Jason. Source
• Authorities restate that Jason was reported missing to the Niceville Police Department on May 24 after he was last seen leaving the College Condominiums on East College Boulevard.
• The sheriff’s office confirms that Niceville detectives developed the Sunset Lane burial-location information through their ongoing missing-person investigation.
• Authorities confirm that Niceville police immediately notified the Walton County Sheriff’s Office because the burial property was within Walton County’s jurisdiction.
• The release confirms that the Walton County Sheriff’s Office Criminal Investigations Bureau submitted and received approval for the search warrant on June 25.
• Investigators confirm Jason’s body was found buried in a shallow grave during the evening of June 25.
• Niceville Police Chief Mark Hayse states that the identification was not the news authorities had hoped to deliver to the Niceville community.
• Hayse says the department stands with Jason’s family and will continue working closely with its law-enforcement partners to see the case through.
• The Walton County Sheriff’s Office states that positive identification is critical when human or skeletal remains are recovered and that families deserve accurate and verified information.
• Sheriff Michael Adkinson states that the next step is to hold every person involved in Jason’s death accountable.
• Adkinson says anyone who knew what happened, helped those involved, or chose not to speak will have to answer for their role.
• Authorities confirm the homicide investigation remains active.
• Johnson remains wanted on an open count of murder and is believed to be actively evading law enforcement.
• Three arrests have been made, and investigators state that additional arrests are expected.
• The Walton County Sheriff’s Office acknowledges assistance from the Niceville Police Department, Okaloosa County Jail, District 1 Medical Examiner’s Office, and State Attorney’s Office.
• Anyone with information about Johnson’s location is asked to contact the Walton County Sheriff’s Office at 850-892-8111.
• Anonymous tips may be submitted through Emerald Coast Crime Stoppers at 850-863-TIPS. A cash reward may be available for information leading to Johnson’s location and arrest.

July 10, 2026

• 8:02 a.m. Update: Walton County Sheriff’s Office is continuing investigative efforts to locate Isabelle Johnson after the discovery of human remains found in a shallow grave on a property off Sunset Lane in Freeport on Thursday, June 25th. Source
  • Yesterday, our agency confirmed those remains belong to Jason Christopher Coulthart following positive identification from the District 1 Medical Examiner.
  • Johnson, 38, remains wanted on an open count of murder and is believed to be actively evading law enforcement.
  • Johnson is described as a white female, approximately 5 feet 3 inches tall and 120 pounds, with brown hair and hazel eyes.
  • She may be using multiple identities and is known to use several aliases, including Harley, Jessica Elaine Bowman, Jessica Elaine Thrush, Jessica Dowdy, and others.
  • Anyone with information on Johnson’s whereabouts is asked to contact the Walton County Sheriff’s Office at (850) 892‑8111. Anonymous tips may be submitted through Emerald Coast Crime Stoppers at 850‑863‑TIPS (8477). A cash reward may be available for information leading to her location and arrest when submitted through ECCS.
    If Johnson is spotted, do not approach her. Call 911 immediately
• 6:01 p.m. Authorities release surveillance video showing Johnson inside a Destin business after Jason’s remains were recovered. Source
  • The footage is released to show Johnson’s recent appearance, voice, and mannerisms.
  • Investigators caution that Johnson may no longer resemble the person shown in the recording.
• Michael Ray White, 74, and Kathleen Morris, 59, are arrested.
  • White and Morris are charged with accessory after the fact to a capital felony and obstruction.
  • White is accused of sheltering Johnson and lying to investigators about knowing her.
  • Morris is accused of transporting Johnson, providing supplies, and helping conceal her location.
  • Their arrests increase the number of publicly identified alleged accessories to five: Wagstaff, Martin Leaverton, Sandra Leaverton, White, and Morris.
  • Authorities warn that anyone knowingly assisting Johnson may face criminal charges.

July 14, 2026

• Authorities renew their appeal for information and recirculate the Destin surveillance video. Source
• Investigators emphasize that Johnson is actively evading law enforcement and may be using aliases or disguises.
• The public is instructed to call 911 for an immediate sighting and not to approach her.

“We’re doing some targeted enforcement because we know that somebody knows. We know that somebody else probably helped her,” Walton County Sheriff’s Office Chief Deputy Dustin Cosson said of Isabelle Johnson, 38, who is wanted on an open count of murder in the death of Jason Coulthart. “That’s our focus on our mission right now: trying to identify exactly where she is and anybody that’s helped her, to hold them accountable.” 

July 15, 2026

• A combined reward of up to $11,000 is announced for information leading to Johnson’s arrest. Source
  • Johnson remains wanted on an open count of murder.
  • Authorities repeat that she is approximately 5 feet 3 inches tall and 120 pounds, with hazel eyes and naturally brown hair.
  • Investigators continue warning that her hairstyle and hair color may have changed.
• 7:33 p.m. An $11,000 reward is now being offered for information leading to the arrest of Isabelle Johnson. Johnson is wanted on an open count of murder in the killing of 43-year-old Jason Coulthart, whose remains were found on Thursday, June 25th, on a property off Sunset Lane in Freeport. The discovery followed information our agency received from the Niceville Police Department regarding Coulthart’s location. Source
• Five individuals have been arrested for accessory after the fact to a capital felony as we continue targeted enforcement efforts in the search for Johnson, who has been actively evading law enforcement. Source
  • Johnson is described as a 38-year-old white female, approximately 5 feet 3 inches tall and weighing about 120 pounds. Source
  • She has brown hair and hazel eyes; however, investigators believe she may have recently cut her hair short and dyed it to disguise her identity. Source
  • She is known to use multiple identities and aliases, including Harley, Jessica Elaine Bowman, Jessica Elaine Thrush, Jessica Elaine Thrash, Jessica Dowdy, and possibly “Denise.” Source
  • She has ties to Okaloosa and Walton counties in Florida, as well as several areas in Georgia and lower Alabama. Source
  • Johnson is known to move around a lot and often gets people to help her by playing on their sympathy.
  • She may tell stories about going through tough situations, like domestic violence or other personal hardships, to convince people to give her rides, money, or other help.
  • She is believed to have a floral tattoo on her left hand near her thumb and forefinger, as well as a tattoo on her right ankle. Source
    Emerald Coast Crime Stoppers is offering up to a $6,000 reward for information, and the Florida Sheriffs Association Criminal Apprehension Assistance Program has contributed an additional $5,000. To be eligible for a reward, the anonymous tip must be submitted through Crime Stoppers

July 16, 2026

• The fugitive investigation expands publicly into Georgia.
• The Habersham County Sheriff’s Office circulates Johnson’s wanted notice because she is known to frequent or have connections to Habersham County.
• Authorities also identify possible connections to Athens-Clarke County, Carroll County, Harris County, and Newnan, Georgia.
• Investigators continue examining Johnson’s connections to Walton and Okaloosa counties in Florida and lower Alabama.
• Law enforcement warns that Johnson may obtain rides, money, lodging, supplies, or other assistance by manipulating people or presenting stories about personal hardship.
• The Walton County Sheriff’s Office publicly urges Johnson to surrender, addressing her by several of her known or suspected names.
• 5:57 p.m. Update from Walton County Sheriff’s Office Source
  

  Isabelle. Harley. Jessica. Whatever you’re calling yourself now. Turn yourself in. Enough is enough. $11,000 for a tip that leads to her arrest, submitted through Emerald Coast Crime Stoppers. Call anonymously by dialing (850)-863-TIPS  

July 19, 2026

• The Walton County Sheriff’s Office releases another public appeal focused on Jason and his family.
• Authorities describe Jason as a son, brother, father, and friend whose loved ones deserve justice and closure.
• Investigators urge anyone who knows Johnson’s location or is helping her to contact law enforcement.
• Johnson remains at large.

July 21, 2026

• 4:42 p.m. Update: The reward for information leading to Johnson’s arrest increases to as much as $16,000. Source
  • The increased reward includes an additional $5,000 associated with the U.S. Marshals Task Force.
  • The fugitive investigation involves local, state, and federal law-enforcement agencies.
• Authorities continue searching across Florida, Georgia, and Alabama.
• National reporting identifies Jason as originally from New Jersey and the father of a 20-year-old son.
• Investigators continue circulating the allegations that Jason was found with a zip tie around his neck in a shallow grave covered by concrete and concealed by a vehicle.

July 22, 2026

• The U.S. Marshals’ involvement and the additional fugitive reward receive wider public attention.
• Investigators describe Johnson as a skilled manipulator who may convince acquaintances or strangers to help her without disclosing that she is wanted for murder.
• Authorities warn that anyone who knowingly provides transportation, money, shelter, supplies, or false information may be arrested as an accessory.
• Johnson remains wanted and is considered dangerous.

July 23, 2026

• The Walton County Sheriff’s Office releases additional identifying information and images of Johnson’s tattoos. Source
• Johnson has a rose or floral tattoo on her left hand, beginning below the thumb and extending toward the index finger.
• She has an unidentified tattoo on her right ankle.
• She has a large scorpion tattoo extending from the left side of her buttock or hip down her left thigh.
• Investigators release the permanent identifying features because Johnson may be changing her hairstyle, hair color, makeup, clothing, and overall appearance.
• The reward remains at $16,000.

July 24, 2026

• Additional details from the five accessory arrest reports become public.
• A witness alleges Johnson killed Jason by tightening a zip tie around his neck.
• The witness alleges Johnson said Jason was aggravating her and had threatened to interfere with custody of her children.
• The records describe Wagstaff’s alleged involvement in digging the grave and concealing Jason’s body.
• The records also describe how Martin and Sandra Leaverton, White, and Morris allegedly provided Johnson with transportation, shelter, belongings, a cellphone, supplies, and help moving between locations.
• Investigators describe Johnson as a “master manipulator” who persuaded several people to assist her while she remained a fugitive.
• The arrest reports also document alleged text communications and efforts to mislead investigators about Johnson’s location.
• The allegations have not been proven in court.

July 25, 2026

• One month has passed since Jason’s remains were recovered from the Sunset Lane property.
• Isabelle Rose Johnson remains at large and wanted on an active warrant for an open count of murder.
• Five people have been arrested for allegedly helping Johnson after Jason’s death.
• The multistate fugitive investigation remains active across Florida, Georgia, and Alabama.
• The available reward remains at $16,000.
• Johnson is 38 years old, approximately 5 feet 3 inches tall and 120 pounds, with hazel eyes and naturally brown hair.
• Authorities believe she may have cut or dyed her hair and may be using disguises.
• Her known or suspected aliases include Harley, Jessica Elaine Bowman, Jessica Elaine Thrush, Jessica Elaine Thrash, Jessica Dowdy, and possibly Denise.
• Her identifying tattoos include a flower or rose on her left hand, a tattoo on her right ankle, and a large scorpion extending from her left hip or buttock down her left thigh.
• Known or reported geographic connections include Freeport, Santa Rosa Beach, Destin, Walton County, and Okaloosa County in Florida, lower Alabama, Habersham County, Athens-Clarke County, Carroll County, Harris County, and Newnan in Georgia.
• Authorities consider Johnson dangerous and instruct the public not to approach her.
• Immediate sightings should be reported to 911. Other information may be submitted to the Walton County Sheriff’s Office or anonymously through Emerald Coast Crime Stoppers.
• Jason’s exact date of death, the location where he was killed, the complete nature of his relationship with Johnson, the final medical examiner findings, and a confirmed motive have not been publicly released.