out not to be pings at all, it was the wrong frequency. so there are a lot of missteps. and the pinger batteries might not have made a difference in the long run anyway, but they shouldn't ever be allowed to be expired. >> interesting what this report is saying and not saying. officials say the pilot and the crew showed no unusual signs of stress. does that rule out, for example, true pilot error or pilot suicide? >> well, i think it does because you need to have evidence of a crime if you're saying a crime was committed, and right now there's no evidence of any crime. there's no evidence of pilot suicide. there's no evidence of sabotage or hijacking. there just simply isn't any criminal evidence to be following criminal leads which, of course, brings the search back to the possibility of a mechanical failure or catastrophic failure. for those we know something happened to the plane. there isn't a lot of evidence of what happened. we know something happened