[browardchad]

Filter out all non-suspect vehicles from the highway; wave them off at exit ramps, or funnel non-suspect vehicles to one lane and let them through. Searching for a deadly killer in wall-to-wall traffic invites disaster -- it's not too far fetched to speculate that the grand finale may well include explosives, if cornered.

[rintense]

But they don't have a suspect vehicle. The white van has been ruled out by officials. So, without a suspect vehicle, then what?