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

https://tammyvaughanmaple.lucialpiazzale.com/professional-licences-at-risk-impaired-driving-and-your-career-in-toronto

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