First of all, I would like to thank Prof. Mrs. Sutinee Sornwai, the Director of the Laboratory of Electricity Generating Authority of Thailand (Mae Moh power plant), for providing me with the opportunities to work as a team in the Forensic Medicine Laboratory. I also wish to thank Miss. Natsara Karnjanarachta, my job supervisor, and other staffs at the Forensic Medicine Laboratory for their kind advices and helps on facilitating the Laboratories and the instruments.