Daniel Pirron, a partner in Delloite’s key General Counsel’s office in New York, was found dead in a car park near his home in Trumbull, Connecticut.

On August 6, Deloitte was accused by the New York Department of Financial Services of aiding Standard Chartered in its “deception” over billions of dollars’ worth of trades involving Iran.

Mr Pirron apparently took his own life seven days later.

Deloitte denies the DFS allegations that have led to Standard Chartered agreeing to pay a fine of $340m.

Speaking publicly for the first time about the incident, Mr Pirron’s brother, Mike, said the family believed the two events were connected and that Daniel Pirron had warned his daughters the day before his death that there was “big trouble” ahead.