-> There was no genetic identification technology.
2. In 1997, DNA was obtained by examining the criminal’s clothes, but it was not in the criminal database, so the case remained unsolved.
-> Genetic identification technology is only capable of confirming the identity of the person or a relative, so further investigation is not possible.
3. In 2020, DNA was analyzed and it was confirmed that the culprit was of Italian descent. The suspects were identified by selecting all immigrants of Italian descent from the area.
-> Over the past 20 years, the technology has been developed to the point where it is possible to analyze the ancestry and lineage of sample genes, finally identifying a suspect.
4. Collect the coffee cup thrown away by the suspect and check its DNA. The real culprit was arrested 46 years after confirmation.
-> Compare the suspect’s genes with evidence obtained by separately collecting them. Real culprit arrested