A police officer supposedly saw you speeding on the opposite side of the road and thirty minutes later you got pulled over by a different cop because of the first cop is this possible?

I know in my expierience with law enforcement it's called a speed trap, however, I have never heard of a situation where the person speeding was pulled over 30 minutes later. That is a big gap leaving room for error in vehicle tracking. But to answer your question one police officer running radar may have you locked in as speeding when you pass his location and pass it on over the radio to another officer down the road. I work on a military installation and we have had speed enforcement events where we would have one police officer shooting radar and a another police officer directing the vehicles speeding into a parking lot and another police officer cutting the tickets.