Disturbing video captured on a Brooklyn subway platform shows a man trying to attack a 20-year-old woman in broad daylight. Vigilantes jumped in to help after the man grabbed the woman. At one point, as she runs away, the man tackles her to the ground. "The only thing he just kept saying was, 'You're mine now, you're mine now, you're coming with me, you're coming with me,'" the woman, who wants to remain anonymous, to CBS New York. The suspect, 42-year-old Fredrick Marshall, of Queens, had a kni