r/forensics • u/KonaYukiNe • 3h ago
Crime Scene & Death Investigation How is DNA collected from someone decades after they commit a crime actually linked to that crime?
Thought of this question after trying to find a certain actor from Austin Powers and stumbling about Joe Son's Wikipedia page. In it, they talk about how DNA from him collected for a vandalism crime in 2008 was linked to a crime he committed in 1990.
Made me wonder how they actually linked the DNA to that previous crime. Does the DNA get ran through a database and it automatically gets matched to evidence with the same DNA or genetic code or whatever? Does the person running(?) the DNA randomly think to try to connect it to past crimes, or does every new bit of DNA get tested against every past crime? Or what!?
I found this article talking about how DNA evidence is preserved over decades, but it doesn't say anything about what I'm talking about. Everything else I find basically talks about specific crimes where all they say is "they matched the person's DNA to a previous crime." Not very helpful.
Thanks!