I was tailgating at a concert before a show. Two patrol men walked over to our tent and asked two of my friends and I for our IDs because they said we were underage drinking. We are all under age 21. They said they had been watching us for twenty minutes from a spot about 40 yards away. They checked one of my friends cups that smelled like beer, and my other friend had a beer can sitting next to him that he had been drinking from. They never once checked my cup. I also didnt have my ID on me, so they took us to the venues police office. During the whole process I was never asked if I was underage drinking. They also never used a breathalyzer to see if i had any alcohol in my system. We were very corroborative with all of the officers. They issued us disorderly conduct tickets.