A mother of a Sandy Hook elementary school massacre victim wrote an open letter directed at informal Trump adviser Roger Stone, condemning his tweet hinting that the parents of murdered Democratic National Committee staffer Seth Rich were paid off to stop seeking out their son's murderer.

Nebla Marquez-Greene, whose 6-year-old Ana Grace was killed in the 2012 mass shooting in Newtown, Conn., categorized Stone as a person "of influence who use[s] conspiracy theories to further a political agenda," in her open letter to the political strategist that was published by the Atlantic.

Stone tweeted on July 10, one year after his death, asking if anyone finds it "odd" that the parents of Seth Rich have "no interest" in finding out who killed their son and suggested it may be a payoff that is keeping them silent.

"There is nothing libertarian about attacking bereaved parents. There is nothing conservative about suggesting that Seth Rich's family was 'paid off,'" Marquez-Greene said. "There is no amount of money in the world that would be enough to take part in anything like this."

Stone responded to the open letter in a statement to the Washington Examiner, saying that he has never written nor spoken of the Sandy Hook incident, but multiple occurrences surrounding the murder of Seth Rich are "by any measure, suspicious."

"I strongly urge her to read the first amendment to the U.S. Constitution and if she's too stupid to understand it, to read it a second time," Roger Stone said in reference to the Sandy Hook victim's mother. "I have no intention of having my first amendment right to comment on the suspicious questions surrounding the Seth Rich murder to be abridged."

The mother of the Sandy Hook massacre victim said she is now willing to accept that her daughter was taken from her, and she now falls under the realm of "bereaved parents," but unwilling to accept that America has begun to normalize abuse of parents who fall under this "marginalized tribe."

"It is wrong and awful but you come to realize that they are even more miserable than you are," Marquez-Greene said in reference to conspiracy theorists in general.

Rich's own parents have fought against the spread of conspiracy theories about their son, and asked the public in a statement on Monday to avoid using him as a "political football."

Marquez-Green warned Stone to be "careful" when messing with the bereaved.

"You are irresponsible. You are cruel. You are a bully. You are careless in word and deed," Marquez-Green said of Stone in closing.