From NBC:

https://www.nbcnews.com/politics/national-security/fbi-probing-if-foreign-governments-groups-funded-extremists-who-helped-n1254525

The source:

“On December 8, 2020, a donor sent 28.15 BTC — worth approximately $522,000 at the time of transfer — to 22 separate addresses in a single transaction. Many of those addresses belong to far-right activists and internet personalities.”

Also,

‘French publication 20 Minutes confirmed the death of a French computer programmer who appears to have been the owner of the Bitcoin wallet from which the extremist donations were sent in December, and the blog on which the suicide note we posted above was published. Reporter Philippe Berry spoke to someone who knew the donor personally, who confirmed his death by suicide on December 8, as well as the authenticity of the note and of the health problems mentioned within. The AP also found a cached version of the obituary, including burial information, that had been deleted.”

https://blog.chainalysis.com/reports/capitol-riot-bitcoin-donation-alt-right-domestic-extremism