CNN CNN Newsroom July 3, 2013 15:40:00
I was looking for partially burned or unburned gun particles. i was looking for any type of sooting present around this hole as well as looking at the ends of the fibers to whether they were blackened or sin himmed or melting. >> and how did you -- >> i couldn't tell whether they were blackened or singeed or? >> melted. >> yeah, if you would stand over there as a visual. >> sorry. >> what did you do to test fire with this particular item? did you take a cutting from it or what did you do? >> i did. i removed a portion of the back of the sweatshirt for testing purposes. >> all right. if you cou...