Simpson has previously sat for three congressional interviews as part of investigations into Russian activities during the 2016 presidential election campaign.
Fusion GPS commissioned Steele to compile his research on Trump's alleged personal and financial ties to Russia into a dossier.
The dossier became part of the evidence used to obtain a secret surveillance warrant to monitor former Trump campaign adviser Carter Page and was published by BuzzFeed News in January 2017.
Ohr's notes also indicate that in December 2016, there was a meeting in Washington, D.C.'s Chinatown between Fusion GPS’ Simpson and Ohr, with Ohr writing, "Glen(n) gave me a memory stick."
In addition, Ohr maintained extensive contact with Steele for months after the bureau cut ties with the former MI6 man in November 2016 for leaking information to the media about his FBI ties.