Matthew Caulk, sex offender, recaptured -- but why was he wearing passive GPS device?

Update: Last week, we told you about the sweeping search for Matthew Caulk, a sex offender who'd previously been the subject of a nationwide manhunt; see our previous coverage below. Yesterday, he was recaptured in Aurora. But the way he was being monitored when he walked away from a halfway house raises questions about the capacity of the GPS unit that had been strapped to his ankle.
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Michael Roberts has written for Westword since October 1990, serving stints as music editor and media columnist. He currently covers everything from breaking news and politics to sports and stories that defy categorization.
Contact: Michael Roberts