I know what memory forensics is and I use Volatility and Second Look and quite a few other things pretty often, I've asked specifically about an instance of cold boot attack that you claimed in a hyperbole that are used often or at all by the police.
You know what I don't need a case, please find me a jurisdiction in which cold boot attacks have passed forensic certification, e.g. a link to the process like for example from a body equivalent to the ASTM https://www.astm.org/Standards/forensic-science-standards.ht... would suffice.
Google around with terms like forensics and "Volatility" or "Volatility toolkit" and you should find some presentations and other references.