Abstract

It is becoming increasingly relevant to understand how much DNA is present on, and who might contribute to, samples collected from surfaces frequently targeted for DNA sampling in criminal investigations. This study investigates the presence of such DNA, also termed background DNA (bDNA), on common entry points in five homes occupied by known individuals. Samples were collected from internal and external windowsills and edges within bedrooms and living rooms, as well as front and rear door handles. The findings of this study contribute to our current knowledge on the prevalence of bDNA in the home and will assist scientists in making informed decisions on sampling strategy.

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