Per Wiki:
Seth Rich’s new “family spokesman” is Brad Bauman a professional Democrat crisis PR consultant with the Pastorum Group.
https://twitter.com/wikileaks/status/763852003093217280
4chan thread on Seth knowing about the two polling location / HRC fix is in:
http://boards.4chan.org/pol/thread/126178626
But he also had access to the emails.
If he’s a Bernie bro and sees all that, he has a strong motivation to tank the entire DWS machine.