The following is a composite of eyewitness testimony from those present during the 9 September 2013 CFB/PHYS 3333 class(*).
The suspect is a white man, age from 18 to "middle-aged", weighing between 140 to 200 pounds and being 5' 8" to 6' 2" tall. The character was wearing some kind of brown robe, brown Jedi robe, sith robe, gym shorts, or brown grim reaper robe. He was carrying most likely a red or yellow plastic light saber, but possibly a cane, light stick, or sword. He took "something" from the front desk; it was a small toy, a green stuffed creature, stuffed animal of some sort, stuffed bear, green teddy bear, Babar, or doll.
This person may have had a beard or some kind of makeup. Maybe a mask. Sunglasses were reported. He was wearing some kind of slippers plus orange gloves.
The suspect entered from the back of the room and walked silently down to the front, picked up something (see above) and left via the front door. The event lasted less than 1 minute, with estimates of 3-5 sec., 10, 15, and 20 seconds being the most frequent.
Did anyone get a picture?
(*) The above is based on the eyewitness testimony of 35/56 students. 21/56 students observed nothing related to the events conducted by the suspect; reasons were not stated.