before her infamous meeting with Don Jr. and others at Trump Tower and he saw her later after the meeting. But he claims he didn't hear about the meeting until it reported in the news much later.
https://www.nytimes.com/2018/01/08/us/politics/fusion-gps-glenn-simpson.html?smid=tw-share
"Mr. Simpson was in court with Ms. Veselnitskaya hours before the Trump Tower meeting and saw her again shortly after it, his lawyer, Joshua A. Levy, confirmed. But these contacts were related to Mr. Simpson’s work on the case for BakerHostetler, Mr. Levy said, and Fusion only learned about the Trump Tower meeting in news reports last year."