Empirical studies have been made into the determination of Time Since Death (TSD).This study attempts to briefly review most of the methods used to estimate TSD and concentrate on the development of a Polynomial Regression Model (PRM) and a Modified Newton's Model (MNM) that accurately predicts TSD and chose the most consistent, efficient and accurate estimator of TSD between the two. Such a model, when accurately developed, will add to the security services scientific ways of predicting TSD, as well as, help in civil and criminal cases. The study found out that the PRM best predicts TSD with an R2 of 99.87 %, given the two secondary data. MAPE,MAD and SSE of the two were tested and compared
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