This part, from a different article, is quite interesting
Undercover agents again spending hard earned tax payers money, doing work for uncle Sam and continuing to operate Bitcoin Fog for the purpose of catching more people in their net.
What is more interesting that OP of this topic and bitcointalk member
Akemashite Omedetou is probably accused Roman Sterlingov, and we can see that he still has has unresolved scam accusation in bitcointalk forum since 2015 for
998 bitcoins, active until the end of 2016.
I don't understand what was he doing in Los Angeles when he was citizen of Sweden & Russia, that was probably his second mistake after domain mistake.
The IRS also appears to have used undercover agents in 2019 to transact with Bitcoin Fog, in one case sending messages to Bitcoin Fog's administrator that explicitly stated that they hoped to launder proceeds from selling ecstasy. Bitcoin Fog completed that user's transactions without a response.
This reminds me on similar tactics used for SilkRoad, and some lessons should be learned from this, especially dealing with personal messages.