I don't know, maybe I'll carry two delicas instead. They are both 3 inches. I wonder if a cop would freak over someone having two knives. Probably.
Switchblades are illegal and require no intent for the arrest. Two knives probably wouldn't raise my eyebrows any more than one would.
Also, can anyone direct me to a link where it says pepper spray is legal in DC? I've been searching forever, and I can only find that it is legal to carry if you register it.
I'll look when I get to work tomorrow but off the top of my head I don't remember when it was changed over. If I find something I'll post a link.