That happened to me once. I'm not particularly proud of the event, but it was the only time in 20 years that I found myself in the back of a squad car. Luckily, in Texas, I was responding to a threat, so no charges were filed. I have a strong hunch that guy never threatened another parent though.
And did your sweet "kid" cause the incident?
Be honest about it, if you kid p*ssed someone off enough to cause that commotion, maybe you deserved some jail time.