Since when is "just one finger" print not enough to place someone inside a crime scene? You also need to consider that computers/national data bases were not around back then to process/cross reference the print = the 20+ year time gap. Today, DNA from 1 drop of blood is used as evidence resulting in slam dunk convictions. The same goes for "just one finger" print.
Royell, it's not as simple as that. To positively link a fingerprint to a suspect you need a certain number of identical marks (14 rings a bell but that may be wrong) Darby claims to have identified, (whatever) the number of identical marks needed for a positive ID,
but other fingerprint experts disagree with him. If there were more fingerprints available for comparison then the experts could reach a consensus but there isn't. Larry's correct, a court would never convict a suspect on just one
controversial fingerprint, a defence lawyer would just pull it apart. The 'Wallace' print is certainly tantalising but like so much in this case 100% certainty is out of reach.