Some Important Tips!
Also, a very important thing to do before you ever have to actually use your recorder, TEST IT!
Try it out in various shirt pockets, make either mental or paper notes, learn how loud you need to be and about how loud or close you need to be to the LEO in question.
Practice starting and stopping the recorder without having to look down at what you're doing. Having a complicated and complex recorder is the worst thing you can do, as the old addage goes, KISS - (Keep It Simple, Son)!
Nothing can truly ruin a horrible experience that you know you're in the right about than to play back that incriminating recording after the fact and learn that all you have recorded either sounds like Charlie Brown's teacher or your racing heartbeat! *LOL*
ALWAYS CHECK THE BATTERIES REGULARLY!