The accused, a taxi driver, was charged with sexual assault after an intoxicated female passenger woke up half-naked in his bed.
The complainant had no memory of how she got into the bed or what happened.
A sexual assault kit revealed the accused's DNA on the complainant's left breast.
The Crown's expert testified about DNA transfer but could not rule out secondary transfer from the accused's bedding.
The court found the expert's evidence on DNA transference was outside her area of expertise and could not discount the possibility of secondary transfer without direct contact.
The accused was acquitted due to reasonable doubt.