>> 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 world. >> did you kill 11-year-old patrick baltazar? >> i did not kill patrick baltazar or anybody else. >> did you ever meet patrick baltazar? >> no, i did not. >> never been in contact with that kid? >> i don't even know a patrick baltazar. >> we offered to show the dna findings to the stepmother, sheila baltazar. >> i can't read it. please don't make me read it. oh, my god! >> so we told her what the fbi report said. wayne williams cannot be excluded as the source of those two hairs. she listened.