I conclude that our police simply do not have enough experts to follow up on something like this.
And that's why Chainalysis is trying to take over the space of forensic blockchain analysis. I have nothing against using their methods to catch criminals and whatnot, but it appears that some of their 'investigations' aren't really connected into some criminal activities. They literally peer into any transaction that they find interesting and connect all the dots, somehow lessening the anonymity of those people involved in the said transaction. Police intelligence divisions aren't really well versed in the said area just yet, but contracting Chainalysis and other blockchain analysis companies for forensic analyses of crimes involving cryptocurrencies isn't really good either.