So in searching Seth on the web, I ran into this which was posted a few days ago: https://fellowshipoftheminds.com/tag/metropolitan-police-ccn-16113797-public-incident-report-on-seth-rich/

Here's a snippet:

Robert Wingate Robinson was one of the MPD officers on the scene of Seth Rich’s murder. On the Metropolitan Police Department’s website, he is listed as Robert Wingate-Robinson.

There’s a Nandi Robinson, 23, who lives with a Robert Robinson in Bel Air, Maryland, 57 miles from Washington, DC

Spokeo link in article

Nandi Robinson‘s

LinkedIn link in article

page says that:

In 2010, she graduated with a B.A. in Economics from Michigan State University. From April 2015 to April 2016, she worked as a Research Associate for Hillary Clinton’s 2016 presidential campaign Hillary for America. From May 2016 to present, she is an IE Deputy Research Director at the Democratic Congressional Campaign Committee in metro D.C.

Maybe a close relative, wife, sister, cousin?