A billionaire played a key role in brokering a long-term oil deal between the Trump administration and Venezuela. This individual was recently the subject of US money laundering investigations. The probes involved funds embezzled from PDVSA, Venezuela's state-owned oil company.

Further details about the investigations and the oil deal are available. The billionaire's involvement in the deal has raised questions, given their recent history of being targeted by US investigators.

The specifics of the oil deal and the current status of the investigations are not fully outlined here, but more information can be found through the original source.