Mr Esmee could have faced life in prison if convicted of murder.
From the late 1980s to the late 1990s, Arbery was regarded as one of the wealthiest men in the country.
By 1991 he had a fortune of more than £80m.
In 1992 his wealth was reduced to just £35m by the severe markets.
His social life had taken a downturn, he had left hotels he had owned in Europe and been flown back to Scotland by the Queen.
In 1994, during the criminal trial for the killing of his son, he was awarded a further £43m payout.
He employed a team of 87 and employed staff at five private members’ clubs in London and a luxury golf club.
He was said to spend more than £10m a year on restaurants and bars.
He had given his name to the Clatto Club in Mayfair, which focused on all things financial.
Iain McQuillan, a professional golfer, was with Mr Esmee as he went on a cocaine binge in February 1995.
Early the next morning he was found with an axe through his skull in his apartment at Hyatt Regency Hotel in The Strand.
Two key pieces of evidence
A few weeks later, after intense legal wrangling, Mr Esmee struck a deal with police in London.
In return for not naming him as the prime suspect, police allowed him to identify Mr McQuillan as his killer.
Police were initially inclined to give Mr Esmee a soft deal, which included a statement admitting he did not do it.
However, they were warned the police murder squad could make a rapid response to any admission he made.
As part of the deal, Mr Esmee was granted a release from hospital and allowed to attend the “pretty fun” party of his daughter Mariah, known as “Mumpy”.
On her 18th birthday, about the time of the murder, Mr Esmee was allowed out of hospital for five days, and during that time, committed suicide.
Four weeks after Mumpy’s birthday, his daughter, Julie, was found dead at the family home in Hollenden by her boyfriend.
Later, Mr Esmee was arrested by American police officers, who began treating him as a suspect in the Tarkington murders.
The standard of evidence against him became less intense and jurors had to decide whether or not they believed him.
By the end of his trial, the house had been burnt down and Mr Esmee was charged with the murders.
He was found guilty and tried in the witness box in Washington DC.
After three days of deliberation, the jury voted unanimously in his favour.
He had been expected to face life in prison if convicted of the murder, and, at his trial in Baltimore, it was also said that he had provided evidence against Martin Onishchenko, the central figure in the racketeering case against black American mob bosses in the 1980s and 1990s.
It was said that Mr Esmee was owed £3m in cash from a loan-shark called Big Sam.
Martin Onishchenko is serving a 27-year sentence in a Maryland jail.
A key witness against Mr Esmee was Mariah’s boyfriend Tom Angelilas, who was one of two people who attended her 16th birthday party in January 1995.