Seth Conrad Richards was slain on July 11 in Washington, D.C. and the reason for his death has remained a mystery. There were no suspects, no witnesses, and no motives, according to the NY Daily News.

In an interview with a Dutch news program on Tuesday, WikiLeaks founder Julian Assange suggested a motive and hinted that Richards was the source of the thousands of DNC emails that showed the Democratic Party was rigging the election against Bernie Sanders.

Assange explained that WikiLeaks does not sit on any material in order to swing elections, and said that his sources put themselves in harms way to expose the truth.

"There's a 27-year-old who works for the DNC who was shot in the back, murdered for unknown reasons just a few weeks ago," Assange said.

The news anchor said it was a robbery, but Assange quickly corrected him and pointed out that none of Richards' items were stolen, according to The Washington Post.

Assange was pressed to confess if Richards was one of his sources, but the WikiLeaks founder wouldn't reveal any more information.

"We have to understand how high the stakes are in the United States and our sources face serious risks, that's why they come to us, so we can protect their anonymity," Assange said.

Even though he was not willing to confirm or deny if Richards was a source, Assange said that WikiLeaks is working hard to investigating his murder, even posting a $20,000 reward for anyone who could give information to the website.

The DNC leak brought down half a dozen top Democratic Party officials, including Chairwoman Debbie Wasserman Schultz.

Watch the full interview below: