case. it was much other evidence. none of it really fit ray. they had fingerprints of the crime scene, none matched. they had footprints at the crime scene, didn t match ray. there were several blood stains on her underwear and several blood stains on her pants. nobody ever looked at that before the trial. they just assumed it was the victim s blood. reporter: plord submits the blood stains for dna testing. the result comes back. the blood doesn t match krone or the victim s. we had reason to believe the truth was coming out and would be coming out and i would be freed. reporter: five years after the rape and murder of kim ancona, krone s second trial begins. once again, the state s case hinges on the testimony of the same bite mark expert. for a second time, he present it is video and detailses how krone s teeth made the bite mark on ancona s breast ares saying
would be automatically labeled ethylene glycol. this is just unacceptable. i was finally completely convinced. i notified the court that i would not be retrying the case. the next day, mcelroy holds a press conference, announcing that patricia stallings will be released. state of missouri is dismissing all pending charges against patricia stallings based upon the death of her child ryan on september 7th, 1989. and i m satisfied, i m convinced that patricia stallings did not poison her child. as i have frequently stated, i believe in the system. the system may not be perfect, but thankfully, it provides for safeguards which allow mistakes to be corrected. unfortunately, we can t undo the suffering that the stallings have endured during this entire ordeal. and i apologize to them both personally and for the state of missouri. 19-month-old d.j. is returned
in the bite. campbell describes what he s seeing. you notice the casts has been re or to show where this tooth is. okay? mm-hmm. moves it again. he s going to move it back to show where that one and that one fit. but he has to move it all the time. are you watching? . mm-hmm. yeah. he s changing the orientation of it all the time. from what he said i became convinced ray was innocent. reporter: ricks kaked a san diego attorney specializing in dna. chris plord who has tried several bite mark cases. i kept thinking there must be something more to the case than just a bite mark. the reality is that s all it was. reporter: plord takes on the case. along with analyzing dna evidence he also contacts the
it s a scientific match. this time, the defense fights back. both dr. sperber and dr. campbell testify. i felt the evidence i presented was so overwhelmingly negative for the prosecution s side that i thought it had gone very well. reporter: the dna and a physical evidence excluding krone is also presented by krone s lawyers. the shoe prints, fingerprints and blood samples found at the scene. i was feeling good. the truth was coming out. the facts were told. the evidence was pointing to someone else. it wasn t matching me. reporter: after seven weeks, the case goes to the jury. they deliberate for three days. i said, i have a bad feeling. they have been out too long. reporter: april 12. the jury has reached a verdict are. their decision is a huge blow. ray krone is guilty, again.
to the stallings. he has spent his entire life up till now in foster care. in 1993 stallings files a wrongful death suit against the hospital and lab for the mistreatment and misdiagnosis of her son ryan. she receives an out-of-court settlement. it was our goal to get this over with so we can go on with our lives. the stallings ask for a public apology, but the lab and hospital remain silent as the case was not brought to court. they ran us through the coals in the public when it was the other way around. now we want a public apology, which they will not grant us. four years after patty s exoneration she and david divorced, the pressure proving too much for their marriage. d.j. continues to struggle with mma and remains in david s care. the stallings case has had a lasting impact on forensic science and its relationship to