Marvin Brown is a convicted sex offender who was released from jail in 1999. Today, he's ill and elderly, suffering from diabetes, stage-four renal disease and congestive heart failure. He's had three mini-strokes in the last two months alone. On good days, he walks with a cane. Other times, he gets around with a walker or an electric wheelchair. But according to Gov. Rick Perry, he poses such a threat to society that he has to wear an ankle bracelet so he can be continuously monitored. Brown says that's a violation of his civil rights, and on Tuesday he filed suit in federal court. "They can't give you freedom and then take it away," he says.