and trying to organize all the testimony into files and organize statements by witness and things like that. reporter: chris mumma, director of the north carolina center on actual innocence, was one of taylor s attorneys preparing for the panel she made a stunning discovery. a file that had never made it to trial from the state bureau of investigation, or sbi s, crime lab. we had been there for a good part of the day going through everything and found the bench notes. reporter: what are bench notes? bench notes are the back-up notes that go with that final report that s issued by the lab. so it is all the actual test results and what the analyst is writing down as they re actually doing the testing before it goes into a nice type written report. reporter: the nice type written report stated there were chemical indications for the presence of blood on greg s truck. blood that jurors said was indisputable evidence of guilt. but lying in a box for the 17