do you know whether they may possibly belong to this particular suspect, for example? >> no, i don't know, piers. i was -- you know, it was all very fast. a lot of screaming, a lot of noise. as i said, i took that one photo and then really rushed in to see if i could help. >> whereabouts in florida are you from, david? >> i'm from jacksonville beach, florida. >> and what is your occupation? >> i'm the ceo of 110% compression and ice, which is we make compression garments for athletes. and i was up at the marathon running. you know, my first boston marathon, so i was super excited. our whole team was there. we were doing the expo. and, of course, it ended in tragedy. and trying to figure out how we can help now. >> final question, i mean, how do you feel if it turns out this is the suspect and it turns out to be the person that did this,