Roger Stone, a longtime ally and adviser to Donald Trump, is spreading the conspiracy theory that the Clintons recently had four people murdered, including anti-Clinton writer and Holocaust denier Victor Thorn.

Stone tweeted on August 9: “Four more dead bodies in the Clinton's wake. Coincidence? I think not.” He then embedded an image headlined “4TH MYSTERIOUS DEATH CONNECTED TO THE DNC IN LESS THAN A MONTH” which featured photos of Democratic staffer Seth Rich, United Nations official John Ashe, process server Shawn Lucas, and anti-Semitic writer and Clinton “researcher” Victor Thorn.

Four more dead bodies in the Clinton's wake. Coincidence? I think not.@ClintonsWar pic.twitter.com/t8Skx2stOB — Roger Stone (@RogerJStoneJr) August 9, 2016

Snopes.com noted that conspiracy-mongers have “latched on to the tragic murder of young DNC staffer Seth Rich to spread false information about his killing,” including that he was headed to an FBI meeting. The site added that conspiracy theorists have also been citing the death of Ashe but “a federal prosecutor's office affirmed Ashe's legal troubles were in no way connected to Clinton.” The site also noted that conspiracy theorists have “associated Lucas with a sinister plot linked to Hillary Clinton by asserting that he was the 'lead attorney' in the DNC lawsuit, but he was just one of the process servers who delivered papers to a DNC office.”

Stone currently heads the pro-Trump super PAC Committee to Restore America’s Greatness after working for Trump’s campaign last year. He regularly talks with Trump and his senior staff. Trump has previously used Stone's advice, including that the election would be rigged in November to favor Clinton.

Stone wrote in his book The Clintons’ War on Women that the Clintons are “plausibly responsible” for the deaths of roughly 40 people. The book is dedicated to Thorn and repeatedly cites his purported research on the Clintons.

Thorn worked for the virulently anti-Semitic publication American Free Press. The site announced Thorn’s death on August 1; a staff write-up stated that Thorn’s family said “there was no evidence of foul play at the scene and that Thorn most likely took his own life.”

Thorn wasn’t just an anti-Clinton writer; he was also a prominent Holocaust denier and anti-Semite. Thorn wrote the book The Holo­caust Hoax Exposed: Debunk­ing the 20th Century's Biggest Lie, which claims to expose “the mythology surrounding 'concentration camps,' the truth about [concentration camp gas] Zyklon B, Anne Frank's fable, how the absurd 'six million' figure has become a laughingstock, and the betrayal by maniacal Zionists of their own Jewish people that led to their deaths." Thorn also blamed a “Jewish plot” for the 9/11 attacks.

Mark Potok, a senior fellow at the Southern Poverty Law Center, told the Daily Dot that “Thorn was akin to being a Nazi and was certainly a Nazi apologist.” Despite that background, Stone dedicated his book to Thorn -- and now he’s claiming the Clintons killed him.