>> this is detective rivera with the orange county sheriff's office. today's date is february 24th, 2010. the time is 4:16. in the room with me is thomas george tobin, is that correct? >> right. >> did you see any blood in the water or anything like that? >> well, that's part of it. she was scalped, and there was no blood. >> okay. >> so pretty much we knew then the heart wasn't beating. >> once they were able to pull her away, how did he let go of her? >> he didn't. >> he never let go of the -- >> of the arm? >> the arm. >> he swallowed it. >> he swallowed it. so the arm is nowhere -- >> right. >> osha on behalf of the federal government is basically suggesting that swimming with orcas is inherently dangerous and that you can't completely predict the outcome when you enter the water or enter their environment.