Logan will have more details on this, but I walked outside to get my truck from the tire shop and heard it from my front yard. So I made my brother drive around to find it and it kept going on and on. I guess the cop was there to keep people from vandalism or something? I don't know but here's a video. Apparently a ribbon cable shorted out.
https://www.youtube.com/watch?v=VdJOzRj6Pr8
On a related note, this morning after rehearsal going to second hour, I heard a Mustang Whelen do one whoop cycle and stop.