Murder suspect captured following 45-day, 3-state manhunt after victim discovered in shallow grave

Murder suspect Isabelle Johnson was arrested Thursday following a weeks-long multistate manhunt spanning Florida, Georgia and Alabama, authorities said.

A U.S. Marshals task force arrested Johnson, 38, at a home in Cottondale, about an hour west of Tallahassee, according to the Walton County Sheriff's Office. 

She was wanted on a murder charge in the death of Jason Coulthart, whose body was found buried in a shallow grave in Florida on June 25.

Authorities said Johnson was taken...