Given the fact that Doug has ripped off others (see this and this), I decided to go back to the police. I contacted:
Financial Crimes and Fraud Unit
300 Indiana Avenue, NW Room 3019
Washington, DC 20001
I saw him this morning. He tried both of Doug's phones. Both lines were disconnected. He also called Lynn (his ex-wife) and left a message.
If you want to provide evidence for Det. Etienne, feel free to contact him.
Hi, I am David Zetland, and I am trying to get my money back from Doug. He has also stolen money from others. You can contact me at dzetland AT gmail.com or 510-455-4656.