Even though Ivanka Trump shuttered her fine jewelry business after her father’s surprise election win, the mysteries around the business have only grown.

In December, GQ reported that a judge had granted a bank permission to subpoena the firm in connection with an alleged money-laundering scheme. The latest twist involves a suspected arson.

In the early morning hours of December 30, on a quiet street in a suburb of New York City, a small fire began to burn in an empty house. Soon the home was engulfed in flames. For the next six hours, firefighters battled the blaze in the cold. After that, the local police took over—opening an arson investigation that remains ongoing.

What ties some charred ruins on Carlton Road in Monsey to the West Wing at 1600 Pennsylvania Avenue?

The house in question was, until not long ago, owned by the family of Moshe Lax—a real estate and diamond heir with whom Ivanka Trump launched her jewelry company. A prominent figure in Trump’s business career—and in her 2010 memoir—Lax first introduced Ivanka to Jared Kushner in 2007. Around that same time, he and Ivanka launched Ivanka Trump Fine Jewelry, complete with a flagship boutique on Madison Avenue. Under the deal, Trump, who then owned a stake in the company, licensed her name for use by Lax's firm, Madison Avenue Diamonds, in exchange for royalties.

Over the years that followed, Lax’s reputation deteriorated. And though Trump has never been accused of wrongdoing, her old partner has been accused in court of a litany of financial misdeeds, including fraud, extortion, and stiffing creditors (some of the allegations have been related to Ivanka Trump Fine Jewelry, some haven’t).

Lax and Trump eventually closed their jewelry business, but questions about the operation linger, including the mystery—now being scrutinized in court—of Lax’s relationship with a businessman named Baruch Rosenfeld, a sometime partner of his who’s connected to a $1.5 million loan that was once given to the jewelry business. Rosenfeld is notable for another reason: His family ​owned th​e​ house on Carlton Road​—the one that had burned and is now the subject of that ongoing arson investigation.

As in plenty of business relationships, the threads here are varied and sometimes tangled. Deals and identities have been obscured by instruments like LLCs. But details surfacing in court offer fresh insight into Ivanka Trump’s former partner—and provide a glimpse at the odd legal mess that remains long after Ivanka Trump Fine Jewelry was discontinued.

Here’s what court filings made by Lax show: Several years ago, a nonprofit controlled by Rosenfeld’s family—a religious organization called Congregation Bais Yehuda D’Ganitch—loaned $1.5 million to what was then Ivanka Trump’s jewelry business. While IRS records show Congregation Bais Yehuda D’Ganitch is indeed registered as a public charity, it is not clear from those documents what the organization does. Nor is it clear what Ivanka Trump Fine Jewelry might have needed with its money. By 2012, though, the charity apparently wanted its cash back and filed a lien against the jewelry business, according to New York State records.

The relationship between Lax and Rosenfeld continued. Two years later, in 2014, the Lax home on Carlton Road changed hands and was acquired by an entity associated with Rosenfeld’s family, according to property records.

Then in 2015, Rosenfeld helped Lax by co-signing with Lax’s wife on a $1 million loan they received from a man named Michael Goldenberg and his wife. A short while later, the Goldenbergs made another loan to the Laxs, for $600,000. According to a person familiar with the loans, they were meant to help Lax set up a post-Ivanka retail venture called Code.