The Rich family is suing Fox for their reporting on Seth's death. Fox is asking for testimony from Julian Assange to show their reporting was credible, and apparently the court is making the request. If Assange says Seth was murdered by the DNC, then Fox's case might be strengthened. If he has evidence of it, it will be a "big story" that will be covered by Fox and a few bloggers while being ignored or reported as "debunked" everywhere else.
Doesn’t seem like Seth’s family has much of a case anyway. Its hardly libel to say someone was Murdered.