perpetrator might visit the house or gravesite if he were made aware of their locations. Both sites were kept under 24-hour video surveillance for several months, but the killer did not surface. A surveillance photo of Paula Prince purchasing cyanide-tampered Tylenol at a Walgreens at 1601 North Wells Street in Chicago was released by the Chicago Police Department. Police believe that a bearded man seen just feet behind Prince may be the killer. Suspects During the initial investigations, a man named James William Lewis was accused of sending a letter to Johnson & Johnson demanding $1 million to stop the cyanide-induced murders. Upon his arrest, Lewis told authorities how the person behind the attacks may have effected the killings—by buying Tylenol, adding cyanide to the bottles, and returning them to the store shelves. Lewis was also found to have previously possessed a poisoning book, and, according to a confidential law-enforcement document, his fingerprints were discovered on pages related to cyanide. Lewis denied being responsible for the poisonings, but he admitted to writing the letter, which he said he had worked on for three days: during the trial, his attorneys claimed that Lewis "intended only to focus the attention of the authorities on his wife's former employer." Lewis was convicted of extortion and sentenced to 10 years in prison. In 2007, authorities determined that the letter had an October 1, 1982 postmark, meaning that, if Lewis's three-day timeline was accurate, he would have begun working on the letter prior to the first news reports concerning the poisonings. When confronted with this information, Lewis recanted his timeline. Court documents released in early 2009 "show Department of Justice investigators concluded Lewis was responsible for the poisonings, despite the fact that they did not have enough evidence to charge him". In January 2010, both Lewis and his wife submitted DNA samples and fingerprints to authorities. Lewis said "if the FBI plays it fair, I have nothing to worry about". The DNA samples did not match any DNA recovered on the bottles. Lewis continues to deny responsibility for the poisonings. Police also investigated a second man, Roger Arnold, a dock worker at Jewel-Osco who told officers that he possessed potassium cyanide. Bar owner Marty Sinclair, whose establishment Arnold frequented, reported Arnold to the police, saying that Arnold had discussed killing people with a white powder and had become increasingly erratic after his marriage had dissolved.