I am working on a DWI appeal where the basis of the stop is a restaurant employee in full uniform pointing frantically at a vehicle. I think that alone is enough, but there was also a report of a prior disturbance involving someone in a similar vehicle minutes before. Can anyone think of any good cases with similar facts?

Try State v Sailo aka Mailo 910 SWd 184 (Fort Worth-App.) 1995, pet ref'd. The information there is from an unidentified citizen who slows down to tell the officer to pull over a driver several cars back.

Sounds very much like the original Terry v. Ohio case. What would a reasonable cop in that situation do?