Hi!
I don't know if this will help because I don't know what happens to the serum post mordem, but I did have an experience on a living patient, (although very close to death) that i drew blood on and promptly got a call from the lab stating the serum was milky. In this case, the patient had been on TPN with Lipids, but the sample I drew was NOT taken out her central line, but a peripheral stick on the other side of the lines so I didn't understand how there would have been enough lipids to make it spin out cloudy, but testing the sample, that is what they came up with.

Is anything unusual showing up in the test results of these samples? Interested in hearing what else you learn from others about this. Good luck! :-)