James Whitey" Bulger terrorized Boston from the 1970s into the 1990s with a campaign of murder, extortion and drug trafficking. In 2013, Janet Uhlar was one of 12 jurors who found Bulger guilty in a massive racketeering case, including involvement in 11 murders. But now Uhlar says she regrets voting to convict Bulger on any of the murder charges. Her regret stems from a cache of more than 70 letters Bulger wrote to her from prison, some of which describe his unwitting participation in a secret CIA experiment with LSD. The agency dosed Bulger with the powerful hallucinogen more than 50 times when he was serving his first stretch in prison, in Atlanta. Uhlar has spoken publicly about her regret before but says her belief that the gangster was wrongly convicted on the murder charges was reinforced after reading a new book by Brown University professor Stephen Kinzer: "Poisoner in Chief: Sidney Gottlieb and the CIA Search for Mind Control." Gottlieb's secret program, known at MK-ULTRA, enlisted doctors and other subcontractors to administer LSD in large doses to prisoners, addicts and others unlikely to complain. Uhlar reviewed the 1977 hearings by the U.S. Senate Committee on Intelligence, which was looking into MK-ULTRA, and found testimony where CIA director Stansfield Turner acknowledged evidence showing that the agency had been searching for a drug that could prepare someone for "debilitating an individual or even killing another person."