At the time I suspected Fusion GPS + Crowdstrike
BTW there is another coincidence that the day after SR was killed Perkins Coie sent Crowdstrike $100K and day after Shawn Lucas was 187 they sent Crowdstrike another $100K. I’m not certain of those dates + timings but it was from reliable reporting.
Hmmmmmmmmmmmm . . . follow the money, indeed.