Emails obtained from Hunter's abandoned laptop between Hunter and Eric Schwerin, his business partner at consultancy Rosemont Seneca, reveal that Schwerin was working on Joe's taxes, discussing the father and son paying each other's household bills, and even fielding applications for a book deal for the then-vice president, as well as overseeing the donation of Joe's senate papers to the University of Delaware.
It is unclear why Schwerin had this intimate part in the vice president's affairs instead of government officials in the Office of the Vice President.
Hunter's assertion that he and his father shared a bank account further raises severe questions about whether funds from the alleged joint account were used for Hunter's May 2018 week-long bender with a prostitute in a Hollywood hotel.
Last December, Hunter admitted that he was under federal investigation over his tax affairs in a public statement.
A former federal prosecutor and specialist on money laundering and criminal tax law explained that if money was running between Hunter and his father, that could make Joe a target of the probe – though investigators would have a tough time sitting down with the president.
"Whatever transaction you're looking at, if there's a connection to a family member or a friend, sure the answer is yes [they would be investigated]," the ex-prosecutor, who asked not to be named, announced.
The FBI and IRS probe is reportedly further looking into his foreign business relationships and the possibility of money laundering charges.
Last year, the Senate security committee issued a report raising fears that the Chinese government was trying to control the White House through a billion-dollar business deal between Hunter's company he co-founded with Schwerin, Rosemont Seneca, and Chinese oil giant CEFC.
John Cassara, a former U.S. Intelligence Officer and Treasury Special Agent who is a specialist in money laundering investigations, announced that were Joe not president, he would presumably be in prosecutors' crosshairs by now along with his son.
"The information available publicly is very worrisome, particularly in the areas of corruption," Cassara explained.
"They could go at this from all different avenues. Follow the corruption trail and then charge money laundering.
"Corruption is a predicate offense for money laundering. And besides corruption, it's the perception of corruption. This kind of thing should not be happening. It undermines full faith in the U.S. government. It undermines trust and our international reputation. It's an embarrassment."