So as happens, my co-workers and I stumped ourselves on a topic while drinking, and I seek answers from TBOT, well cuz right or wrong, the replies are always entertaining. I could simply do the research myself, but figured it would make a fun thread (like the "American History Question" one I posted last week) and besides the answer doesn't really matter, we just wondered, and couldn't seem to figure out if this would fall under the 4th amendment or not. Let's say you are crossing the street, and have some pot in your pocket. A K9 unit just happens to be in the first spot at the red light, and you're walking in front of it. If the dog "alerts" to your presence, is that probable cause for the officer to stop you, or search you? This probably varies quite widely by state, but let's add the detail that you are in a "zero tolerance" state when this happens. What says TBOT?