Breakout Art Gallery

Late last night, someone killed a guard inside the Breakout Art Gallery. He or she then stole a painting off of one of the exhibitions, and left without being seen. All we know is that he/she had to have been an artist from the gallery, because they are the only people with a key to the gallery. The thief also hacked into our site, and, lucky for us, left clues about every other artist in the gallery except for him or her self...why don't you take a look at the site and see for yourself? Could you be so kind as to help us solve the crime, and find justice for that poor security guard?