they re the prosecution s lab. they are not the justice system s lab. they are the prosecution s lab. reporter: chris mumma was taylor s attorney and runs the north carolina center on actual innocence. i think there s been a culture of that lab in the legal department, in the management and the leadership that we are here to convict. reporter: mumma says it is a culture promoted by the fact that the lab really does work for the prosecution, a practice the national academy of sciences says should end. north carolina is one of a dozen states around the country where the crime lab reports to the attorney general s office. only 11 states have labs totally independent of law enforcement. they should be independent scientific organizations that are focused on the truth. and they can t be under the control of someone or some organization that might cause them to be biased in their reporting.
years greg was in prison was a test the sbi never shared, a more definitive test that showed the spot may not have been blood after all. the jury never heard it. chris mumma now had the document that turned the case on its head. we had that they had misrepresented what was on that truck. we had greg s innocence in our hands. reporter: at some point during your 17-year career inside prison, chris came to you and said guess what guess what? it wasn t blood. it still amazes me when i think about it, you know. because you just don t expect a lab to hide evidence. reporter: during his original 1993 trial, the prosecution referred to blood evidence over a dozen times.
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
investigation crime lab withheld evidence that could have set him free. i ain t running nobody. reporter: floyd brown spent 14 years locked up for a crime he didn t commit. was there any evidence whatsoever linking him to the crime? no. the only thing that puts floyd in this case at all is the fictional confession. i think over the last 20 years a culture has developed at the sbi that basically the ends justify the means. you had hoped that these were isolated incidents. the more we dug, the more we found that that wasn t the case. you never anticipate anything like this. you always think that there s a sense of justice in the world and that the system works. reporter: it was september 25th, 1991, in raleigh, north carolina, and greg taylor was spiraling down a destructive path. a husband and devoted father with a steady job, he was fighting a losing battle with crack cocaine. i think there was two days that kind of sum it up. which was the day before i was ar
tony, i don t feel comfortable calling you that. i feel i should call you sir anthony. no, call me tony. i don t know. i feel uncomfortable when people call me, especially in this country. they usually say sir hopkins. i m not uncomfortable, but i want you to be uncomfortable. call me tony. your new movie, i saw it last night. it s a dark world of exorcism. i have read interviews where you said you aren t too sure. something grabbed you in the script, what was it? i thought i don t want to do another weirdo. you do do the world s great weirdo. i guess so. but, i have done two of them. so, he wants to meet me, we bet at a beverly hills hotel. he s one of those, he s a swede, and he s distant. laid back. he doesn t show great feelings. it s based on a true story and he didn t want to do spinning heads. was it the fact that it was partly factual that attracted you to this? there was a priest that did the endless extraordinary exorcisms? i played two parts, the prie