Everything clean? Transfer of DNA traces between textiles in the washtub

摘要: Forensic genetic analysis of items possibly handled by a suspect or victim is frequently inquired the law enforcement authorities, since DNA left on touched objects can often be linked to an individual. Due technical improvement, even poor traces, which seemed unsuitable for few years ago, may amplified successfully today. Yet, transferred crime scene artificially unintentionally without any primary contact between individual and object found at scene, so-called secondary transfer indirect in general. In this study, "secondary transfer" scenarios with cells different origins under wet conditions were investigated. Transfer was simulated as either "washing hand" washtub "machine laundry" washing machine. As expected, major differences seen blood stains epithelial abrasions. from donors could detected clearly both donor acceptor textile, regardless method. Regarding abrasions, simulating worn clothes, after hand, only little residual found, partial profiles displayed while textile occurred less not noteworthy amount quality. Single alleles textiles machine wash, but no reliable profile verified laundry Therefore, one cloth (without stains) another seems extremely unlikely.