I happened to read that article the other day, quite interesting.http://www.wired.com/threatlevel/2013/03/alfred-anaya/
No technical details, but from the description, as CB says, it pretty much points to a CANBUS tap. I was surprised at how hard they threw the book at the guy that built the traps. He got twice the sentence that the drug dealers did. It would have been hard to argue that he was innocent, but I think they got it backwards.
Hi Jack - do you have any idea about how you would actually go about tapping into the CANBUS for this purpose? I know there is an interface you can buy for arduino, but I have no idea from there haha.