[Police] Sting "King of New Jersey"

Hi everyone, I have a question: I was given the Sting live "King of New Jersey" bootleg, and wondered if anyone knew the history of this? Who made it, what was it made for (promotion?), did someone plug into the board because the quality is so good. I think I've seen this posted long, long ago, but obviously being so old my memory is failing. Thanks for anyone that can help! Michelle Troy, Michigan