They were in the open, probably on some low power hand-helds as I'm on the other side of the airport and could only hear the people on Wetmore and Broadway. The agents on 410 were not heard until they had recovered the cash and were on their way to the wreck scene.
Yeah I've been hearing 418.625 pop up this morning and a little in the past also- all encrypted. Thought it was crazy, had just reprogrammed one of my Pro-95s, flipped it on and that's the first freq that popped up- I thought no way. Sure enough wish I had been on 410 when the money was thrown out... so I could have turned in the evidence...;-)
The money that was recovered was over $100,000 in cash. They had to stop traffic on Loop 410 right there to recover it. Awesome hearing this happen in real time. I felt sorry for the dude, but if you have the DEA following you, well, you just got bigger problems.