Abstract
ABSTRACT This preliminary research aimed to determine if a forensically useful human DNA profile could be obtained from latent blood past the point at which the blood could be visualized with luminol. Five participants with differing physical characteristics created shoeprints from fresh human blood over concrete, linoleum and carpet. The amount and distribution of both visible blood and chemiluminescence emanating from latent blood were documented. DNA analysis was performed on samples taken from the fifth last latent shoeprint to show chemiluminescence and the first and tenth steps after which chemiluminescence no longer occurred. DNA from the blood source was obtained past the point of visualization using luminol, with 2 of the 30 samples generating full STR DNA profiles, 18 generating partial profiles of 4 or more alleles, and 3 generating between 1 and 3 alleles. Of the 7 samples which did not generate a profile, 6 came from the concrete. Higher amounts of DNA, and more full and partial profiles, were obtained from linoleum compared to concrete or carpet. Participant effect was not observed. These findings demonstrate that it may be possible to obtain forensically useful DNA from crime scenes even when blood is not able to be visualized with chemiluminescence.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.