That is a rumor. They claimed to have fired Parkin over a year ago and he never left. He was right there scamming with Makarov the entire time.
... And Monimpex's boys of summer are still as active scamming as they have ever been. The press releases tell the tale. If there was a separation between Makarov and Valentin, there would have never been a PR claiming the big shipments of gold for last year. That PR screams Monimpex and Valentin has to be talking to Monimpex for such a PR to be released. Proof positive!