Article Photos: Man charged in letters case described as troubled 11/13

City of Corinth police cars prevent access to a house in the West Hills Subdivision in Corinth, Mississippi, Thursday morning, April 18, 2013. Law enforcement officials were blocking off the dwelling after taking Paul Kevin Curtis of Corinth, Mississippi into custody under the suspicion of sending letters covered in ricin to the U.S. President Barack Obama and Mississippi Senator Roger Wicker (R-MS). Curtis was arrested at his home in Corinth, Mississippi, and is "believed to be responsible for the mailings of the three letters sent through the U.S. Postal Inspection Service which contained a granular substance that preliminarily tested positive for ricin," the Justice Department said in a statement. (AP Photo/Rogelio V. Solis)