iowa investigators took the bun and photographs to gene czarnicki, a certified print examiner at the dci crime lab in des moines, iowa. czarnicki not only confirmed this was a right foot in the soft bread but found enough clear ridge detail to convince him that it was the footprint of carlos robinson. >> i think if the bun was in a dry or stale condition, the print may have not been reproduced. we were quite fortunate in that the bun appears to have been fresh when he stepped on it. >> this proved that the only evidence at the crime scene was carlos robinson's. investigators believe christina