Public impeachment hearings into Donald Trump begin Wednesday with witnesses set to be grilled by high-ranking Democrats and Republicans.
Two star lawyers are also expected to play a prominent role in the questioning, including the man who looks set to become Trump's new nemesis - Daniel Goldman.
Goldman, who will be assisting Intelligence Committee chair Adam Schiff with his interrogations, is a former federal prosecutor in the feared Manhattan office, who spent a decade helping to take down some of New York's most-wanted.
Working as part of the Violent & Organized Crime Unit for the Southern District of New York he helped bring cases against both the Italian Mafia and Russian mob.
With three hours to ago Trump himself launched a Hail Mary attempt to get Goldman out, tweeting that Goldman was 'a high priced outside lawyer,' and adding: 'Did that lawyer ever work for me, which would be a conflict?'
Technically Goldman did; he was assistant U.S. Attorney in the Southern District of New York from November 2007 until November 2017.
But he has hardly made any secret of his hostility to the president since then, declaring on MSNBC that Trump had committed a 'felony' to get elected.
Daniel Goldman, a former New York prosecutor who helped take down Mafia hitmen and Russian mobsters, will lead Democrats in questioning impeachment witnesses
Goldman, who has also worked as a legal commentator for MSNBC in which he was frequently critical of Donald Trump, will be given 45 minutes to quiz each witness
Yale and Stanford-law educated, Goldman clerked for two Bill Clinton-appointed federal judges before joining the famously independent Southern District of New York.
It nicknames itself the sovereign district and was once -ironically - led by Rudy Giuliani, in his days as a Mafia buster, which was what Goldman initially became.
He joined as assistant district attorney in 2007 and in 2009 he was involved in the prosecution and subsequent conviction of Fotios 'Freddy' Geas, a hit-man for the Genovese crime family.
Geas was sentenced to life in prison in 2011 alongside his brother, Ty, and former Genovese crime boss Arthur 'Artie' Nigro.
The trio were convicted of the contract killing of rival mob boss Adolfo 'Big Al' Bruno, who was gunned down outside a club in Massachusetts in 2003, and the murder of mob figure Gary Westerman in the same year.
Goldman's talents were also put to work busting a wide-ranging insurance racket being run by the Russian mob.
In 2012, federal prosecutors led by Preet Bharara - who was later fired by Trump - indicted 35 people in a $275million no-fault insurance scam, which was the largest of its kind ever uncovered at the time.
Among the accused was reputed Russian mobster Mikhail Zemlyansky, also known as 'Russian Mike', and three of his associates: Skinny Mike, Fat Mike and Mike B.
Prosecutors said Zemlyansky exploited legislation guaranteeing car accident victims up to $50,000 in damages even if nobody was found to be at fault.
The scheme involved more than 100 clinics, thousands of patients, 10 corrupt doctors and three lawbreaking lawyers, prosecutors said.
During his ten years as a prosecutor with the Southern District of New York's Violent & Organized Crime Unit, he helped secure convictions against Mikhail 'Russian Mike' Zemlyansky (left) for fraud, and Genovese family hitman Fotios 'Freddy' Geas (right)
Goldman was also involved in the prosecution of gambler Billy Walters for insider trading, and was specifically hired to the team because of his courtroom 'swagger'
Family man: Daniel Goldman married his wife Corinne in Mexico in 2013. She is a Penn law school graduate
Relaxing at home: Daniel and Corinne Goldman live in New York with their five young children
In 2015 Zemlyansky was convicted of fraud and sentenced to 15 years in jail. In total, 30 people were convicted in the case.
Two years later, Assistant U.S. Attorney Brooke Cucinella specifically requested Goldman for her team to lead a prosecution against Las Vegas gambler Billy Walters for insider stock trading.
Cucinella knew the trial would attract media attention, and wanted Goldman on board for his 'swagger' and ability to control a courtroom.
Walters was eventually found guilty on all counts and sentenced to five years.
Speaking to the Washington Post about Goldman, Bharara said: 'He was one of the go-to trial guys, and there’s no case that’s too complex for him.