The abduction and killing of 9-year-old Jessica Marie Lunsford — allegedly by a convicted sex offender who lived nearby and had failed to register with authorities — is a grim reminder of the flaws in the country's tracking system, victims' advocates say. John Evander Couey, 46, was formally charged today with capital murder in the abduction and death by asphyxiation of Lunsford. He had failed to register his change of address as required as a sex offender, authorities say. There are more than 400,000 registered sex offenders in the United States — convicted criminals whose fingerprints, names, and addresses have been recorded on official lists. But victims' advocates say almost 25 percent of them have slipped through the cracks, and authorities no longer know where they live. "The problem is sex offenders are responsible for their own compliance," said Donna Coleman, president of Children's Advocacy Alliance. "So you have felons that are responsible for complying to register, which is crazy because they're not exactly your top notch citizens."| Give me some money and I'll fix it for you. It's not that hard. Leave the care and feeding of the system in the hands of social workers and politicians and you can give me more money later to fix something else that should have been obvious. |