Touch deoxyribonucleic acid(DNA)refers to the DNA that is left behind from skin cells when a person touches or comes into contact with an object.In crimes where the identification of suspects becomes a challenge,touch...Touch deoxyribonucleic acid(DNA)refers to the DNA that is left behind from skin cells when a person touches or comes into contact with an object.In crimes where the identification of suspects becomes a challenge,touch DNA has been a proven investigative tool.The present study aims to provide a systematic review of the role of touch DNAin criminal cases which discusses the nature and importance of touch DNA evidence at crime scenes;various phenomena including the transfer and persistence of touched samples;different factors affecting the touch sample deposition and DNA shedding;the best recovery methods and collection of samples from different substrates;and the interpretation of profiles through advanced techniques that identify the suspects.The present study also aims to optimize standard protocols in the laboratories for touched samples appropriate to the substrates that improve the success rate of profiles from touched items.展开更多
Fiber evidence has played a crucial role in ascertaining various characteristics and has aided in providing evidential value to the fiber evidence as well as reconstructing events during crime scene investigation.Alth...Fiber evidence has played a crucial role in ascertaining various characteristics and has aided in providing evidential value to the fiber evidence as well as reconstructing events during crime scene investigation.Although fibers are transferred easily at the crime scene and various methods of interpretation exist,it is challenging to get a fiber match.The present study aims to provide a systematic review of the role of fiber as trace evidence.It explores the fiber population,transfer and persistence of fibers,fiber shedability and recovery,effect of laundry on fibers,stabbing events,the resistance of fabric against weapon's penetration,the behavior of fabric upon ballistic impact,and various analytical techniques of fiber examination.The study approaches to evaluate the significances and uncertainties of the recovered fiber evidence.展开更多
文摘Touch deoxyribonucleic acid(DNA)refers to the DNA that is left behind from skin cells when a person touches or comes into contact with an object.In crimes where the identification of suspects becomes a challenge,touch DNA has been a proven investigative tool.The present study aims to provide a systematic review of the role of touch DNAin criminal cases which discusses the nature and importance of touch DNA evidence at crime scenes;various phenomena including the transfer and persistence of touched samples;different factors affecting the touch sample deposition and DNA shedding;the best recovery methods and collection of samples from different substrates;and the interpretation of profiles through advanced techniques that identify the suspects.The present study also aims to optimize standard protocols in the laboratories for touched samples appropriate to the substrates that improve the success rate of profiles from touched items.
文摘Fiber evidence has played a crucial role in ascertaining various characteristics and has aided in providing evidential value to the fiber evidence as well as reconstructing events during crime scene investigation.Although fibers are transferred easily at the crime scene and various methods of interpretation exist,it is challenging to get a fiber match.The present study aims to provide a systematic review of the role of fiber as trace evidence.It explores the fiber population,transfer and persistence of fibers,fiber shedability and recovery,effect of laundry on fibers,stabbing events,the resistance of fabric against weapon's penetration,the behavior of fabric upon ballistic impact,and various analytical techniques of fiber examination.The study approaches to evaluate the significances and uncertainties of the recovered fiber evidence.
