General Discussion

But Mr. Trump made an exception when buyers of units in Trump SoHo, a 46-story luxury condominium-hotel in Lower Manhattan, asserted that they had been defrauded by inflated claims made by Mr. Trump, his children and others of brisk sales in the struggling project. He and his co-defendants settled the case in November 2011, agreeing to refund 90 percent of $3.16 million in deposits, while admitting no wrongdoing.

The backdrop to that unusual denouement was a gathering legal storm that threatened to cast a harsh light on how he did business. Besides the fraud accusations, a separate lawsuit claimed that Trump SoHo was developed with the undisclosed involvement of convicted felons and financing from questionable sources in Russia and Kazakhstan.

And hovering over it all was a criminal investigation, previously unreported, by the Manhattan district attorney into whether the fraud alleged by the condo buyers broke any laws, according to documents and interviews with five people familiar with it. The buyers initially helped in the investigation, but as part of their lawsuit settlement, they had to notify prosecutors that they no longer wished to do so.
...
Mr. Sater was convicted and sent to prison in 1993 after a New York bar fight in which he stabbed a man in the face with a broken margarita glass. That was a matter of public record. However, what few people beyond insiders at Bayrock knew was that five years later, Mr. Sater was implicated in a huge stock manipulation scheme involving Mafia figures and Russian criminals — and that he became a confidential F.B.I. informant.

https://www.nytimes.com/2016/04/06/us/politics/donald-trump-soho-settlement.html?_r=0