30 years ago, there was no dna testing. now there is. and so new evidence. remember those two human hairs found inside 11-year-old patrick baltazar's shirt? in 2007, the hair fragments were sent to the fbi's dna laboratory in quantico, virginia. the result? the lab said it found this dna sequence in only 29 out of more than 1,100 samples of african-american hairs in its database. less than 3%. most important, wayne williams' dna had the same sequence. >> i think -- i don't think they said it was a match. they said they could not rule out whomever the hairs were from as being the possible donor. >> the fbi's hal dedman, a dna expert, said this finding is as strong as it can get with this particular type of testing. >> it probably would exclude 98% or so of the people in the