https://www.techdirt.com/articles/20180609/13541040000/attorneys-seth-rich-linked-defamation-case-demand-identifying-info-thousands-twitter-users-updated.shtml

UPDATE: According to Dissent Doe (who runs the essential Databreaches.net), the ridiculous subpoena has apparently been withdrawn by Aaron Rich's lawyers.

The brother of murdered DNC employee Seth Rich is suing some right-wing writers and their publishing platforms for defamation. Aaron Rich raises some rather decent libel claims, pointing out he's been subjected to numerous articles, tweets, podcasts, and livestreams pushing the theory he's either responsible for his brother's death or profited from it in some way. The lawsuit [PDF] names America First Media, the Washington Times, and writers Edward Butowsky and Matt Couch as defendants.