“There are too many dimensions to the tragedy and none seem to make any sense," lobbyist Jack Burkman said in a press release. "I hope the $100,000 in additional money will finally get to the truth of what happened here and will either debunk the conspiracy theories or validate them. But for the sake of Mr. Rich’s parents, family, friends, co-workers and the D.C. community at large, the murder needs to be solved and those responsible held accountable.”
Last month, police said they don't have any evidence suggesting the slaying is connected to the victim's work at the DNC. Attempted robbery has been cited as a possible motive.
WikiLeaks previously offered a $20,000 reward for information leading to a conviction in Rich's death.
A reward of as much as $25,000 is also being offered by the Metropolitan Police Department.
Rich, a Nebraska native, was a rising star in the DNC, colleagues said.
His mother, Mary Rich, said she took comfort knowing her son tried to make the world better.