I always look through the Fairfax Co. Police weekly activites report:
http://www.fairfaxcounty.gov/police/crime/incident-reports/2013/010413weeklyactivityreport.htm
I noticed that at the top there is always a quick summary, for example on the current one it says 106 DWI-related charges. Just below, it shows what directed patrols have come up with in that same week.
In the last week, over the span of four directed patrols a total of 10 DWI drivers were caught.
My question is: why would FCPD post that they took the time to do directed patrols, when said patrols accounted for less than 10% of DWIs? And where did the rest come from, routine traffic stops?