The LEOs are at a distinct disadvantage in this situation. What needs to happen is for citizens to organize somewhat, and just observe areas that would be likely targets. I silent Freep in a sense. Every Mall, Strip Mall, Church, school, ect needs to have it's members state the place out. All they need to do is sit in a inconspicuous car and wait hour upon boring hour (preferably with tinted windows and multiple camcorders).
It would simply be a silent freep. All they have to do is be there to collect data when the next hit happens. They don't need to attempt a citizens arrest, engage in highspeed chaises, or anything else stupid. As much fun as it would be to drag dead towlies around behind your '76 Suburban with .30 cal wounds to the chest and knee (oopsie, flinched instead of squeeezed) in a morbid parade for the international press, the citizens would only need to serve as a tripwire for Law Enforcement.
This situation is the reason the founding fathers protected the viability of a Militia.
I agree with you that the LEOs are at a disadvantage. It's VERY difficult to catch someone who operates like this. I just hope they are all thinking outside the box and wish they'd coordinate press conferences with a single source -preferrably a well spoken source. The feds keep telling us they are coordinating together and could prove it to me if they would have ONE spokesperson for the entire operation. But my husband was in LE and I know how difficult their job is and don't ever mean to criticize the important and extremely dangerous job they do.