Nope...sorry. Drugs. The roach clip is a dead away.

Edited to add...I agree about the door and lock. I do not let my kids (any of them) have rooms that I am unable to enter. What if she ODed or was too sick to let you in? Anyway, I would be removing the whole doorknob, I think, or at least replacing it with a closet knob. JMHO.