The Eyrie

FREEPORT, FL — Florida investigators are asking for the public’s help in finding a murder suspect they say has been using disguises and multiple identities to stay ahead of law enforcement. Authorities have offered a combined $16,000 in rewards for information that leads to the arrest of Isabelle Johnson, 38, who has been charged in the killing of 43-year-old Jason Christopher Coulthart.

The Walton County Sheriff’s Office says Johnson may have altered her appearance and used aliases while on the run. Deputies describe her as dangerous and are warning people not to approach her if she is seen. Instead, they are urging anyone with information to contact investigators or submit an anonymous tip through a crime stoppers hotline.

How investigators say Johnson hid in plain sight

Deputies say Johnson has been using more than one identity while trying to avoid capture, and they believe she has changed how she looks. In a statement, the sheriff’s office called her a “master manipulator” and said she “disguises herself well.”

Investigators also released a physical description: a white woman about 5 feet 3 inches tall, weighing roughly 120 pounds, with brown hair and hazel eyes. Authorities said she is known to use several aliases, including Harley, Jessica Elaine Bowman, Jessica Elaine Thrush and Jessica Dowdy, along with others not publicly detailed.

Officials say the warning is important because Johnson may not appear the same as in earlier photos. The sheriff’s office has emphasized that anyone who spots her should not try to intervene.

The murder case tied to Jason Christopher Coulthart

Johnson’s charge stems from the death of Jason Christopher Coulthart, whose remains were found in Florida after he had been reported missing in May. Coulthart was last seen leaving the College Condominiums complex on May 24, according to the Walton County Sheriff’s Office.

Investigators later identified a Freeport property where they say his body had been buried. Unidentified remains were recovered there on June 25, and a DNA match earlier this month confirmed they were Coulthart’s. Authorities said he was found in a shallow grave, ending weeks of uncertainty for investigators and his family.

The case has developed into a wider criminal investigation, with multiple arrests already made as deputies continue to trace what happened after Coulthart disappeared.

Five arrests have already been made in the investigation

Authorities say five other people have been arrested and charged in connection with the killing. Two of those suspects are accused of helping Johnson avoid investigators, according to the sheriff’s office. Officials have not publicly detailed all of the charges tied to each person.

The arrests suggest investigators believe Johnson did not act alone or remain isolated after Coulthart’s death. Instead, deputies say other people may have helped hide evidence or assist her while she was fleeing. The sheriff’s office has continued to release updates as the case has progressed, including the warning that Johnson may be moving under different names.

For investigators, the challenge now is not only solving the homicide but also locating a suspect they say is actively trying to avoid detection.

Rewards now total sixteen thousand dollars for tips

Several groups have joined the effort to bring Johnson in. Emerald Coast Crime Stoppers and the Florida Sheriffs Association are offering $11,000 for information that leads to her arrest, while the U.S. Marshals Task Force is adding $5,000 for tips that result in her capture.

That brings the total reward to $16,000, a sum investigators hope will encourage someone to come forward with a useful lead. Officials said cash may be available for information that helps locate Johnson and put her in custody.

Anonymous tips can be submitted through Emerald Coast Crime Stoppers, and the Walton County Sheriff’s Office is also accepting direct calls from the public.

Authorities urge the public to call if they see her

The sheriff’s office says Johnson should be considered dangerous, and deputies are telling the public to stay away from her if she is spotted. Anyone with information is asked to contact the Walton County Sheriff’s Office at (850) 892-8111.

Anonymous tips can also be made through Emerald Coast Crime Stoppers at 850-863-TIPS (8477). Authorities said a reward may be available for information that leads to Johnson’s location and arrest.

For now, investigators are relying on public awareness, urging people to look closely at the photographs they have released and report anything that might help track her down.