Together, these findings broaden the potential applicability of TFD-based PMI reconstruction. The performed lab and crime scene validations reveal PMI reconstruction accuracies of 0.26 h ± 1.38 h for true PMIs between 2 h and 35 h and total procedural durations of ~15 min. Utilising thermal photogrammetry, this approach also represents the first non-contact method for PMI reconstruction. Here, we develop an individualised approach, enabling PMI reconstruction for bodies in arbitrary postures, by combining photogrammetry and TFD modelling. However, in forensic practice, bodies are often found in non-straight postures, potentially limiting applicability of this algorithm in these cases. To overcome this, we previously developed a thermodynamic finite-difference (TFD) algorithm, providing a rigorous method to simulate post-mortem temperatures of bodies assuming a straight posture. The current standard PMI-estimation method empirically correlates rectal temperatures and PMIs, frequently necessitating subjective correction factors. Determining the time since death, i.e., post-mortem interval (PMI), often plays a key role in forensic investigations.
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