Question on tenant smoking marijuana

[Andy Sabisch]

Question . . .our leases have a NO SMOKING INSIDE clause.  On one of our duplexes, the tenant on one side reported that the smell of marijuana is coming from the other side.  Not going to get into a discussion about people being able to do what they want in their house but in PA, recreational use is still illegal.  How would you deal with the report from the other tenant and how do you confirm that the smell is actually marijuana.  Thanks in advance . . .