I think that it means "check and investigate" - Cape Girardeau PD uses the term "Make Your Own Case" This pretty much means that the officer has to observe a violation in order to make the stop. They don't just locate the vehicle and make the stop based on the initial report.OK, well here is another one I hear all the time...
The dispatcher puts out a call for, let's say a report of reckless driving in the Interstate, and tells the officer to C & I or CNI. I am pretty sure the I stands for investigate, but I can't seem to find out what the rest of it means.
Hey guys... Just to clear up the CNI thing... You had some good guesses! But it actually stands for Criminal Name Index, which is a tab option in the CPIC which is the "10-29". The CNI just checks your name against the criminal records for "possible" matches.