Minimum time since death when the body has either reached or closely approximated equilibrium with ambient temperature

In temperature based death time estimation the construction of a death time interval using the conventional Nomogram method (NM) is not permissible for bodies in which rectal temperature (Tr) has reached or closely approximated equilibrium with ambient temperature (Ta). We provide a logic approach to compute a minimum time since death with high probability. We also provide a simple graphical solution to be used at the crime scene for preliminary estimation. Special attention is advised in regards to cases with Ta > 23 °C as well as borderline cases. Proof by induction, application to test cases and one example of use are presented.