(DAILY CALLER) -- A Washington, D.C. lobbyist is offering the largest reward in D.C. history for the unsolved murder of Seth Rich, a Democratic National Committee (DNC) staffer gunned down over the summer.

Attorney Jack Burkman is offering $105,000 of his own money for information that leads to the arrest and conviction of those responsible. The D.C. Metropolitan Police is offering a $25,000 reward, and WikiLeaks announced it is also offering $20,000 for any information that leads to a conviction in the murder of Rich.

Rich, 27, was the voter expansion data director at the DNC, according to Roll Call; he was employed for two years. Rich also worked on a computer application to help voters locate polling stations.

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