on the fourth day word came. a verdict. >> we, the jury, find as follows, count one, malice murder. as to count one we find the defendant guilty. >> reporter: guilty on all counts. i'm sure you'll never forget that moment. >> it's ludicrous. it's insanity. >> reporter: what would you say to the jury? >> i'm disappointed. i don't feel like they did their job. >> reporter: we wanted to know how the jury reached its decision. none of the jurors would speak to us on camera, but one did tell us they paid close attention to that video that shows ross harris returning to his car at lunch time. in fact, the jury wanted to re-examine the video during deliberations. the juror also told us that in his heart of hearts he believes ross harris meant to kill his son. the prosecution says the jury got it completely right. but hearing the word "guilty" was no cause for celebration.