Sometimes possessing larger quantities and other paraphernalia (scales, baggies, etc.) is enough to get intent to distribute charges which is a felony.

this is in our lease regarding prohibited conduct, aka violation of the lease, "criminal conduct, regardless of whether or where arrest or conviction occurs, including but not limited to: manufacturing, delivering, or possessing a controlled substance or drug paraphernalia; engaging in or threatening violence; possessing a weapon prohibited by law; discharging a firearm in the apartment community; or, except when allowed by law, displaying or possessing a gun, knife, or other weapon in the common area, or in a way that may alarm others"I'm no lawyer but the person who wrote this lease is a lawyer, "regardless of whether or where arrest or conviction occurs" leads me to believe that suspicion of illegal activity is enough.

@Jordan Ursino I just found out about the drug paraphernalia yesterday.

I check the county court web site, and he also has a drug conviction from a traffic stop last year - marijuana paraphernalia, resisting arrest without violence.