I'm sorry about the loss of your friend as well. Small world we were MP's as well. "combat support" though I did 270 combat patrols in NW Baghdad.
Our advances in anti IED technology is probably way beyond what I know by now. As for radio controlled IED's they weren't really that much of a threat (though one of the ones that hit me was cellphone controlled).
While I was down there we had systems that jammed and recorded all signals within a few hundred meters. Usually the ones that do go off are IR or command wire detonated.
Here's a picture of my HMMWV
Before I write further. Though I blacked out bumper numbers, none of the information I'm about to share isn't already public and well known by Achmed himself. In fact we sold some of this technology to Iraq already.
You can see the stick on a spring on the vehicle to the left of mine that's the Duke it's the jammer.
The box on a stick on the front of the vehicle is what we call a Rhino. originally made with a ammo can and a glow plug it is for IR IED's. Basically it makes a EFP detonate early.
We had some other stuff for command det IED's but I wont explain them.