1 Department of Forensic Medicine, National Police University of China, No. 83, Tawan Street, Huanggu District, Shenyang, Liaoning 110854, China.
2 Department of Forensic Medicine, National Police University of China, No. 83, Tawan Street, Huanggu District, Shenyang, Liaoning 110854, China. Electronic address: guofei@npuc.edu.cn.
3 Criminal Investigation Department of Yunnan Province, No. 656, Guangfu Road, Xishan District, Kunming, Yunnan 650228, China.