With regard to that Essex incident, I was on the Beltway near 83 at around 5:00 and I must have seen at least 6 or 7 unmarked cars, over a 5 minute period, from vans, to SUVs, to a really slick secret service looking SUVs, to everyday cars, booking down the fast shoulder in the other direction from my travel (toward Essex) with every imaginable light bar, strobe, and siren sequence. This was one of the times I was quite happy to have the 396. I had no idea what was happening. I never saw anything like it and really wanted to hear what was going on. It was at that moment I saw the "Elite TAC Unit" channel light up with activity - for me the first time seeing that.
Thanks TinEar for that write up. I did hear everyone responding and at one point heard on the Elite TAC channel "do you need a sniper immediately" so I realized it was a barricade situation as I was driving, but now I know what went down. Thx again for the update!