“…While reliable determination of PMI values is only possible for up to 72 h [3], entomology can, under certain circumstances, specify a PMI for up to two months [4]. Further attempts have been made using a variety of methods, from simple analysis of protein composition to supersonic conductivity [5][6][7]. For a PMI of longer than a few years, a number of papers suggest measuring specific radionuclides such as 14 C, 90 Sr, 137 Cs, 228 Th, 228 Ra, 210 Po, and 210 Pb [1,[8][9][10][11][12][13]].…”