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In 2009, three days before Halloween,
a grisly crime stunned the seaport town of Anacortes, Washington.
Mark was known as the dog whisperer of Anacortes.
They soon discovered a story tangled in obsession.
Who was the hunter and who was the hunted?
Follow and listen to Train to Kill, the dog trainer, the heiress,
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Carol Barrios and her family moved to the U.S. from Honduras in the late 90s.
Carol is a U.S. citizen.
Her dad has a green card.
Seven years ago, Carol's parents divorced, and her dad went back to Honduras.
But this winter, he decided to return to the States, to be closer to his grandkids.
That was his trigger for him to want to come back,
to say, OK, you know what, he has been missing on.
When Carol's dad landed in Miami in February, he was detained by immigration authorities.
His green card wasn't set to expire until 2028,
but the agent said he hadn't filed the proper paperwork to reenter the country after those seven years abroad.