Sandwich Delivery! [ooc: Ron will find a rather delicious looking assortment of sandwiches on a platter in his apartment. IT'S A TRAP.
All the sandwiches contain a slow-acting poison! It will cause paranoia, hallucinations, and eventually, if left alone for a few days, can lead to death. Magical/power-y healers will be able to remove it, at some point, if desired, but it is probably not going to be something normal modern medicine can identify.