The Art of the Deal ghostwriter said President Donald Trump and two of his adult children and a son-in-law all belong in prison.
Tony Schwartz co-authored Trump's notorious book, which was first published in 1987, and is now a vocal critic of the president.
"Crime family: Donald, Ivanka, Jared, Donald Jr. They all belong in prison," Schwartz tweeted on Monday evening.
President Trump is facing impeachment for alleged abuse of power by soliciting a foreign government's interference in the 2020 election to his personal benefit.
Trump is also facing probes by a number of bodies, including Congress and the New York attorney general, into allegations such as tax fraud, campaign finance violations, and his inauguration funds, among others.
The family real estate business, The Trump Organization, is caught up in some of those investigations.
The president's two eldest sons, Donald Trump Jr. and Eric Trump, currently run the Trump Organization.
His eldest daughter, Ivanka Trump, was an executive there until her father entered the White House. She and her father both resigned from the company at the same time in 2017.
There are also a number of ethical concerns around the Trump family and its business dealings, such as Ivanka Trump's patent-seeking in China as her father wages a trade war against Beijing, and their alleged use of the presidency to promote their properties and businesses.
Jared Kushner, who is married to Ivanka Trump, has faced scrutiny for his dealings with foreign governments, in particular a bailout his own family's real estate business took from the Qataris, and his personal relationship with Saudi Crown Prince Mohammed Bin Salman.
The Trump family denies any wrongdoing.
Back in May, Schwartz said, in light of everything we now know about President Trump, he would rename the book he wrote on behalf of the
"If I had to rename The Art of the Deal, I would call it The Sociopath," Schwartz said on CNN.
"Because he has no conscience, he has no guilt. All he wants to do is make the case that he would like to be true.
"And while I do think he is probably aware that more walls are closing around him than ever before, he does not experience the world in the way an ordinary human being would."
Then in June, when the journalist E. Jean Carroll accused Trump of sexual assault in the mid-1990s, adding to a list of women who have made such allegations against the president, Schwartz called him a "serial felon."
"A 16th woman yesterday accused Donald Trump of sexual assault—in this case rape, with very specific details," tweeted Schwartz.
"In what sane & decent world can this man continue as president of the United States?" continued Schwartz's tweet, adding that he believed Trump should be put on trial for repeated "violent criminal behavior."
happyfuckincakeday on November 26th, 2019 at 13:53 UTC »
When Trump was running for president I heard this guy on NPR talking about how bad a president he'd be because his attention span is shorter than a goldfish. I'll always remember that.
KingFlippyNips9 on November 26th, 2019 at 13:51 UTC »
The Trump family and their minions are the most corrupt administration in US history. And given there was Reagan and Bush, wow that's saying something
FanDiego on November 26th, 2019 at 13:22 UTC »
This thread is filled with people sick of hearing from this guy, but I see things a little bit differently.
Trump is a criminal. His family are criminals. His cabinet, his government, filled with criminals. Everyone should be saying it loudly. I'm glad this dude is.
Donald Trump and his family are criminals.