"In 2016, Nellie Ohr handed her husband a thumb drive with her research on various Russian entities with possible ties to Trump, Bruce Ohr testified. Ohr then passed that thumb drive along to agents at the FBI who were working on the Russia investigation, since it did not fall under his purview as the DOJ’s director of the Organized Crime Drug Enforcement Task Force."
https://www.rollcall.com/news/congress/top-republican-to-release-bruce-ohrs-transcript-on-dossier-russia-investigation