More incriminating Van Pelt clues:

1. Three tattos on sholder is sign of breast cancer sruvivor. The doctors use the tattos to line up the radiation beams. Tatoo dots won't wash away during the course of the treatment.

2. When bug lady shows up and asks for Cho Van Pelt tells her Cho's not here, but his desk is over there in case you want to bug.
.
Problem with clue #2 is Van pelt already has access to much of what is said at Cho's desk
by virtue of working accross the room.  Need not be fatal problem - maybe she needs 24 hour coverage, or maybe she'll be off for more computer training soon.

This weeks regularly scheduled "are you doing it" talk between Cho and Rigsby shed no new light, except that Rigsby is very happy to wake up next to her. Looking forward to next weeks.
 
Want more clues? See Theory #7048 by Tigran