The sister of late White House deputy counsel Vince Foster wrote a Washington Post op-ed strongly condemning presumptive Republican presidential nominee Donald Trump for reviving the conspiracy theory that the Clintons killed her brother.

Trump recently told the Post that the circumstances of Foster’s death were “very fishy” and Foster “knew everything that was going on, and then all of a sudden he committed suicide.”

Sheila Foster Anthony responded to Trump’s “wrong,” “irresponsible,” and “cruel” remarks in a May 26 piece headlined, “Vince Foster was my brother. Donald Trump should be ashamed.” She wrote: “For Trump to raise these theories again for political advantage is wrong. I cannot let such craven behavior pass without a response.”

She noted that five investigations concluded that Foster’s death was a suicide and he “told me he was battling depression” days before he committed suicide.

“Never for a minute have I doubted that was what happened,” she added.

Anthony noted that after Foster’s death, she began to read “countless conspiracy theories spun by those who claimed that the Clintons had Vince murdered because he knew something about Whitewater” and “These outrageous suggestions have caused our family untold pain because this issue went on for so long and these reports were so painful to read.”

Asked about Anthony’s op-ed, Trump today said, “I really know nothing about the Vince Foster situation.” He also claimed it shouldn’t be a part of the campaign “unless some evidence to the contrary of what I’ve seen comes up.”

Leading conservative media figures and outlets such as The Wall Street Journal, Sean Hannity, Rush Limbaugh, and Fox News have pushed conspiracy theories about Foster and the Clintons in the years after his death.

While many reporters condemned Trump’s remarks as “bizarre” and “kooky,” his reference to the Foster conspiracy theory drew praise from fringe conservative media.

Conspiracy theorist radio host Alex Jones on May 24 claimed “there’s a cover-up going on, so we don’t know what it is, but that’s good for an open investigation with the death. .... The Clintons thought they would just have their past not looked at, but Donald Trump is willing to do it.” Jones is one of Trump’s most vocal allies and has hosted the candidate on his program.

WND, best known for obsessing over President Obama’s birth certificate, recently claimed that Trump’s conspiracy is “backed by new evidence.” The site’s 2015 “man of the year” was none other than Donald Trump, who called the accolade an “amazing honor.”