The Future of Law Enforcement was one of the exhibits in the Hill Valley Science Expo. It was hosted by Officer Danny Parker and displayed some of the new technology developed by the police force for better stopping crime.
The new developments included a robotic police suit and a potted plant that contained a recording device. At the push of a button it would be activated, recording anything that was said.
During the expo the plant recorder was "borrowed" by Marty McFly, who was attempting to discredit Edna Strickland in order to save the future from her influence. This he did, giving the plant back to Officer Parker and thus exposing Edna as the one who had burned down several speakeasies and framed Carl Sagan.