Pesticides are frequently encountered in forensic toxicology division of FSLs. Due to pendency of medico-legal cases; biological samples are often stored for some time from the time of collection before analyses. The role of temperature and putrefaction that may inevitably interfere with analyses results is often ignored in such cases. In our preliminary study, we have tried to produce evidence for difference in thin layer chromatography results of two insecticides- carbofuran and carbaryl as a direct consequence of changes in preservation methods of samples. This subject must further be explored taking into consideration factors like temperature, humidity, time duration, etc. so as to support research on better preservation methodology of forensic samples.

 Keywords: Carbofuran; Carbaryl; Chromatography; Putrefaction; Forensic Science Laboratories (FSLs).