[expedition32]

This is why crimes used to have prosecution time limits. Nobody expected eye witness accounts to surface after 40 years. But DNA is eternal.

[DiscourseFan]

DNA is not eternal, but neither is anyone's memory trustworthy for that long.

[cucumber3732842]

Prosecution time limits and those pesky rights people have is why so much stuff that would've been simple misdemeanors 70+yr ago is now "administrative" and "civil" law.