“So why doesn’t Assange bring forth the evidence?”
Assange has been isolated for years, and at last look, was arrested and incarcerated in the UK. Various charges have been levied against him, from the initial “rape” charge that never added up, to espionage for publishing leaked communications that embarrassed the US government. (Some of it might have compromised intel operatives and sources, so Assange is likely not entirely innocent).
I’ve never understood why the FBI or even the DC Metro Police couldn’t arrange to interview a man holed up in the Ecuador Embassy or a prisoner held in a UK jail. It’s almost as if no one wants to ask Assange about Seth Rich...
Wikileaks is based on anonymity, if they reveal their sources, nobody would leak to them. If Assange is hinting that Seth Rich was the source, that doesn’t mean that Rich was the source. It could well mean that he definitely wasn’t.