Walton County Sheriff's Office in Florida is intensifying its search for Isabelle Rose Johnson, 38, a fugitive wanted in connection with the murder of Jason Coulthart, 43. Authorities revealed new identifying features, including several tattoos, in hopes of aiding her capture.

Johnson is accused of killing Coulthart, whose remains were discovered on June 25 in a shallow grave on a property in Freeport, Florida. He was found zip-tied with a concrete covering and a black Cadillac parked on top of the burial site. Coulthart, originally from New Jersey, was reported missing on May 24. It is not publicly known if Coulthart and Johnson had a prior relationship.

The sheriff's office has stated that Johnson is known to use multiple aliases, including Harley, Jessica Elaine Bowman, Jessica Elain Thrush, Jessica Elaine Thrash, Jessica Dowdy, and possibly Denise. Authorities described her as a "dangerous" fraudster with connections to Okaloosa and Walton counties in Florida, as well as parts of Georgia and Alabama.

Authorities believe Johnson may alter her appearance, including her hair color and length, to evade law enforcement. She is approximately 5 feet 3 inches tall and weighs about 120 pounds, with brown hair and hazel eyes.

Law enforcement highlighted specific tattoos that could assist in identification. Johnson reportedly has an unidentified tattoo on her right ankle and a large scorpion tattoo that extends from her left rear to her thigh. Previously, police disclosed she has a rose or flower tattoo on her left hand, near the thumb and extending toward the index finger.

Wanted poster for Isabelle Johnson, 38, for murder, with a mugshot, description, $16,000 reward, and photos of new identifying tattoos. The reward for information leading to Johnson's arrest has been increased, currently standing at $16,000, up from an initial $6,000. Five other individuals have been arrested on accessory charges related to Coulthart's killing, though their specific connection to Johnson has not been disclosed.

Sheriff's officials warn that Johnson may manipulate others by fabricating personal hardships, such as domestic violence or other difficulties, to gain sympathy and solicit rides or financial assistance. Authorities are urging the public to consider her dangerous and to avoid assisting her. The sheriff's office has expressed confidence that justice will be served.