https://www.vox.com/world/2018/1/30/16951490/trump-russia-dossier-cody-shearer-memo-nunes
This second document, like the first, is highly controversial. For starters, its author is Cody Shearer — a political activist with strong ties to the Clinton administration in the 1990s. He has no experience in intelligence, which makes his involvement with a document that could reflect badly on Trump look suspiciously partisan.
Things get murkier. Christopher Steele, the ex-British intelligence officer who authored the first dossier, gave the new “Shearer memo” to the FBI in October 2016. Apparently, he received Shearer’s work from an unidentified American contact and handed it over to authorities in an effort to give the FBI more evidence for its investigation. Steele noted that he couldn’t vouch for the claims in the second dossier, however.