Soledad O'Brien

And that's when, according to Janney's theory, the CIA decided to assassinate the president.

And that's when, according to Janney's theory, the CIA decided to assassinate the president.

News reports said it was the work of one deranged gunman. But those closest to Kennedy weren't so sure. CIA Director John McCone went to Bobby Kennedy's house that day, and the two discussed the assassination. Historian Arthur Schlesinger and Bobby Kennedy's son, RFK Jr., later reported Bobby suspected a conspiracy behind his brother's murder. Many close to Kennedy thought something smelled fishy.

News reports said it was the work of one deranged gunman. But those closest to Kennedy weren't so sure. CIA Director John McCone went to Bobby Kennedy's house that day, and the two discussed the assassination. Historian Arthur Schlesinger and Bobby Kennedy's son, RFK Jr., later reported Bobby suspected a conspiracy behind his brother's murder. Many close to Kennedy thought something smelled fishy.

One of the seven members of the Warren Commission charged with investigating the president's death was none other than Alan Dulles, the same man Kennedy fired the year before. Apparently, he shared a book saying American assassinations, unlike European assassinations, were usually the work of a lone gunman. Ultimately, the commission argued one man shot JFK.

One of the seven members of the Warren Commission charged with investigating the president's death was none other than Alan Dulles, the same man Kennedy fired the year before. Apparently, he shared a book saying American assassinations, unlike European assassinations, were usually the work of a lone gunman. Ultimately, the commission argued one man shot JFK.

The official report was given to President Johnson on September 24, 1964. Less than three weeks later, Mary was dead on the towpath.

The official report was given to President Johnson on September 24, 1964. Less than three weeks later, Mary was dead on the towpath.

Another conspiracy theorist in the 90s looked into Mary's murder. A man named Leo DeMoor. He claims that he learned key information about Mary's death from her diary. the diary that no one else has ever claimed to have seen after Angleton took it. In a 1993 conversation with his lawyer, Damore claims he got his hands on a copy of it.

Another conspiracy theorist in the 90s looked into Mary's murder. A man named Leo DeMoor. He claims that he learned key information about Mary's death from her diary. the diary that no one else has ever claimed to have seen after Angleton took it. In a 1993 conversation with his lawyer, Damore claims he got his hands on a copy of it.

Damore said Angleton had given the diary to someone Damore knew, and through that person, Damore read what was inside of it. He claims that Mary confronted her ex-husband, Cord, after the Warren Commission report came out. She apparently told Cord that more than one gunman was involved, and the CIA, too.

Damore said Angleton had given the diary to someone Damore knew, and through that person, Damore read what was inside of it. He claims that Mary confronted her ex-husband, Cord, after the Warren Commission report came out. She apparently told Cord that more than one gunman was involved, and the CIA, too.

From there, Cord supposedly told James Angleton about Mary's growing agitation over the commission's findings. Janney seized on this reporting from DeMoore, then argued that Mary was ready to raise a stink publicly about the CIA's involvement in JFK's death. So what could she have known?

From there, Cord supposedly told James Angleton about Mary's growing agitation over the commission's findings. Janney seized on this reporting from DeMoore, then argued that Mary was ready to raise a stink publicly about the CIA's involvement in JFK's death. So what could she have known?

After JFK's assassination, Mary allegedly sought answers from two of the president's closest advisors, Dave Powers and Kenny O'Donnell. By then, O'Donnell had told conspiracy theorist Leo Damore in an interview that things in Dallas went down differently than the commission reported.

After JFK's assassination, Mary allegedly sought answers from two of the president's closest advisors, Dave Powers and Kenny O'Donnell. By then, O'Donnell had told conspiracy theorist Leo Damore in an interview that things in Dallas went down differently than the commission reported.

And those two presidential advisors told Mary herself that they'd seen two bullets come from in front of JFK's motorcade. Meaning, at the very least, more than one gunman had been involved in the shooting. Right around this time, Mary told her friends she felt she was being followed.

And those two presidential advisors told Mary herself that they'd seen two bullets come from in front of JFK's motorcade. Meaning, at the very least, more than one gunman had been involved in the shooting. Right around this time, Mary told her friends she felt she was being followed.

She'd found a garden door and a basement door to her Georgetown home open after she'd been out, and told another friend she was scared of finding someone inside. Meanwhile, Angleton bragged that he tapped Mary's phones and her bedroom. The wife of another CIA official confirmed this with biographer Nina Burley. And if you believed Moore and Janney, that was the beginning of the end for Mary.

She'd found a garden door and a basement door to her Georgetown home open after she'd been out, and told another friend she was scared of finding someone inside. Meanwhile, Angleton bragged that he tapped Mary's phones and her bedroom. The wife of another CIA official confirmed this with biographer Nina Burley. And if you believed Moore and Janney, that was the beginning of the end for Mary.