Was the $2 Bill on Chuck's Body a Code?

Two random men turned up at Chuck Morgan's family home three weeks after his death. They told Ruth that they were FBI agents, but didn't tell her what they were looking for. After this incident, investigative journalist Don Devereaux started to take a real interest in Chuck's case. He called the FBI and through the Freedom of Information Act, he requested the details on Chuck. But the FBI just said that they'd never even heard of Charles slash Chuck Morgan.