My cousin's roomate called from a holding cell about a "trafficking" word the officer used

http://www.haddadtrialbook.com/home-page/2013/8/2/haddad-to-resign-after-decade-on-the-bench-in-cook-county.html

My cousin's roomate called from a holding cell about a "trafficking" word the officer used, we froze because none of us knew how different that is from simple possession.