The murder of a Democratic National Committee staffer remains unsolved and now his family is asking for the public's help in finding the killer. 

Seth Rich, 27 was shot and killed in July in the Bloomingdale area of Washington, D.C. The murder was originally thought to be a robbery gone wrong, but Rich's wallet, watch and cell phone were not taken. 

"You have two people who shot my son twice in the back," said his mother, Mary Rich.

"We're not going to stop until we find my son's murderer. We will find his murderer, but we need all of you."

Rich's parents were joined at a news conference today by Republican lobbyist Jack Burkman

FOX DC reports that Burkman put up $100,000 as a reward for information leading to an arrest, bringing the total to $125,000. 

Rich also applauded interim DNC chair Donna Brazile for helping their efforts to find the murderer.

In August, WikiLeaks offered a $20,000 reward amid rumors and conspiracy theories about Rich's death, which came just days before the release of hacked DNC emails.

Police said they have no evidence to suggest the murder was related to Rich's job at the DNC and on Monday, a family spokesperson said "there is no conspiracy theory."

WikiLeaks co-founder Julian Assange discussed the reward money in an August interview with Megyn Kelly, saying the organization was "very interested in anything that might be a threat to alleged WikiLeaks sources." 

"We're not saying Seth Rich's death necessarily is connected to our publications," he added.

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