Abstract

A signifi cant question in forensic casework is the estimation of time since death (TSD) in the early post-mortem phase. Muscles undergo a condition of rigor mortis following death, accompanied by post-mortem consumption of adenosine triphosphate. Lividity is a dark purple coloration of the skin induced by blood accumulating in the aff ected area. Environmental factors play a crucial part in the determination of TSD using diff erent parameters through various methods. The purpose of this study is assessment of TSD and eff ect of contributory variables on existence of rigor mortis and fi xation of lividity in cadavers kept at room temperature during winter season in Varanasi region. This is a prospective and observational study. 102 cadavers escorted for medicolegal autopsy at the mortuary of the Department of Forensic Medicine, Banaras Hindu University, Varanasi for the duration of consecutive two years in winter season from December 2019 - February 2020 and November 2020 - February 2021. All the cases were studied for rigor mortis and found an average post-mortem interval of 18.67 ± 9.43 hrs. Post-mortem lividity was found to be not fi xed in 21 (20.59%) cases before 10 hrs, while 76 (74.51%) cases of lividity had already been fi xed after 10 hrs and 5 (4.9%) cases of lividity were found to be not observable. Livor and rigor mortis have minimal predictive potential due to the eff ect of diff erent contributory variables on the development of rigor and fi xation of lividity

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