Police investigate one of their own when a detective becomes a suspect in the shooting death of his wife. "48 Hours" contributor Nikki Battiste reports.
Brian Fanion says he and his wife Amy Fanion had been arguing about his retirement plans when she picked up his service weapon and shot herself. Investigators did not believe his story.
Laborers, many of whom are migrants from Mexico, Guatemala, Venezuela or other Latin American countries, head to the tracks six days a week to help keep the $2.7 billion racing economy galloping.
