Allen Weisselberg, the chief financial officer for the Trump Organization, has surrendered to New York authorities, according to US media reports, ahead of criminal charges expected to be announced later on Thursday against him and the former president’s company.

The anticipated charges mark a decisive turn in a nearly three-year investigation of Donald Trump’s business by Cyrus Vance, the Manhattan district attorney, in tandem with New York attorney-general Letitia James.

They concern fringe benefits paid to Weisselberg and other top executives for things such as private school tuition, car leases and apartment rent, according to people briefed on the matter. Lawyers involved in the case were waiting for the charges to be unsealed later in the day to see the precise details of the case.