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He looks at me and said i told you they're not my prints. >> it's just the ammunition the jackson team feels it needs to win at trial. the riky jackson murder trial begins. jackson has now been in jail for nearly a year. in opening arguments, the defense drops its bombshell. they have proof that riky jackson's fingerprints were mistakenly identified by the upper darby police department. >> we did not know until opening statements which avenue of the forensic evidence that the defense would challenge. >> sergeant anthony paparo spends three days on the stand testifying for the state about his i...

>> i do feel a lot of disappointment for -- for the criminal justice system. >> in march of 2000, the delaware county district attorney's office formally withdraws the case against riky jackson, citing insufficient evidence. this means jackson will not be retried for the crime. >> we decided here that the fingerprint evidence was sufficiently in question that we no longer could prove beyond a reasonable doubt that this defendant is the one who committed this crime. >> the upper darby police department and paparo still stand by the accuracy of his identification. to date, the alvin davis murder...

Mind being fingerprinted. jackson's fingerprints and several others are sent to fingerprint examiner sergeant anthony paparo for comparison to the latent crime scene print. paparo has reviewed thousands of print-related cases in his career. he is often called upon to testify in court as an expert in the field. >> during the course of the investigation, over a two-week period i was given well over a dozen fingerprints to look at. i take all those fingerprints and i go through each one individually. >> it's an intricate process but one that's proven successful to law enforcement professionals fo...

Night at home in over two years. >> i do feel a lot of disappointment for -- from the criminal justice system. >> in march of 2000, the delaware county district attorney's office formally withdraws the case against riky jackson, citing insufficient evidence. this means jackson will not be retried for the crime. >> we decided here that the fingerprint evidence was sufficiently in question that we no longer could prove beyond a reasonable doubt that this defendant is the one who committed this crime. >> the upper darby police department and paparo still stand by the accuracy of his identificatio...

Statements which avenue of the forensic evidence that the defense would challenge. >> sergeant anthony paparo spends three days on the stand testifying for the state about his identification methods and findings. >> the judge permitted me to come down off the witness stand with my chart and stand in front of the jury. i'm showing the points and doing the unit relationship to show everyone sitting there. i went through painstakingly how i eliminated individuals, how i could not eliminate individuals and visually showed the jury how the identification was made. >> for the defense, wynn and mcclo...