The daughter-in-law of a politically influential British billionaire was marched out of a Belize jail—and past a shrine to the senior police officer she is accused of killing—for transfer to a prison known for its harsh conditions. Her face shadowed by a red hoodie, Jasmine Hartin concealed her shackled hands with a plastic bag as she was walked to a golf cart that would take her to a boat for the ride from San Pedro to Belize City—where she...