How did he know that?
He wasn't the complainant. In fact, he said he just came to get his stuff and was going away.
There's a breakdown in how it came to pass the perp got into the apartment with the cop ~ several of the folks commenting appear to have bought into the idea that the guy was IN THE APARTMENT THE WHOLE TIME ~ yet, he was in the yard. She even brought him his last bag of "stuff".
I still think there's a toker in the link here ~ and the other justices know who it is but aren't sayin'.