I am a college student and went to my friends party where the cops showed up for a noise complaint. Me and 14 others were in a room where I decided to try this drug for the first time (along with everyone else). I stayed in the room a little longer to fix my hair and two guys came back in to do more. I left the room and noticed everyone walking out the front door. I followed and was confronted by an officer who saw me through the window doing a line. I was identifiable because I was wearing a tribal headband that looked memorable (according to the cops). Apparently my friend was outside the window and wanted to come inside and stop me, but the officer said no, watch. So not only did he not arrest those in possession, but enabled the use of drugs. I was the only one to get arrested. Advice?The cops let everybody else leave the party, but interrogated me for about 2 hours prior to driving me to jail. At the station they did a urine drug test along with other tests to determine if I was under the influence (dilated pupils, heart rate, eyelid fluttering... etc.). They released me without bail, so it was simply book and release at the jail. Also, I was underage drinking.