- "I was a good soldier. I was a really good soldier, but a pretty bad human being."
- ―Harold Overmeyer
Harold Overmeyer is a suspect and later aid to the investigation in The Woman in the Tunnel. He lives in the tunnels beneath Washington D.C., where he is considered a leader and arbitrator amongst the residents there. When Booth first arrests him for possession of the victim's camera and bloody clothes, it is revealed he has a distinguished military record and saved five of his men from a pregnant woman holding a grenade. However, he chooses to live underground to pay back his debt for what he feels were acts he should not have committed.