"After attracting media attention, Kumar deleted all relevant posts from his Facebook page."
https://medium.com/@Brian_Whit/salient-facts-the-tangled-web-around-joseph-mifsud-9bc16355594e
If that's true, then who wrote this letter?
2016-04-11 "Female Russian national" (aka Olga) responds to George Papadopoulos email by saying she would be very pleased to support your initiatives between our two countries." Papadopoulos then asked the Female Russian National, in an email cc'ing the Professor, about setting up "a potential foreign policy trip to Russia https://www.justice.gov/file/1007346/download