1Department of Chemistry, Biochemistry and Forensic Science, Amity School of Applied Sciences, Amity Education Valley, Amity University, Gurugram (Manesar), Haryana-122413, Haryana, India
2Department of Forensic Science, Punjabi University, Patiala-147002, India
*Corresponding Author Dr. Bhuvnesh Yadav (Assistant Professor II) E-mail: bhuvneshyadav@gmail.com Mobile: +91-9899402613
Online published on 21 March, 2022.
Chance prints available at the crime scene and secondarily transferred cellular material can be a good source of DNA if processed properly. DNA transferred on to the contact surface is directly correlated to perspiration, and the shedder status of an individual. The advantage of this technique is that the latent fingerprints can be first used for fingerprint analysis by application of powder method and can then be processed for generating profiles. This review article focuses on the individual specific factors affecting transfer of DNA, impact of handling time, pressure and environmental factors etc. This literature survey has been done to summarize the various factors influencing touch DNA recovery, its methods of collection and extraction. It is crucial to analyse DNA recovery using various protocols. This article discusses the significance and potential utility of touch DNA in investigation of medico-legal cases.
Forensic Science, Touch DNA, Perspiration, Epithelial cells, Fingerprint, Genotype
