Continuity mistake: When Dex stabs Lila, the knife goes in near her stomach, where her vest starts. But in the close up shot, the knife is higher up in her, in her chest. (00:48:45)
Continuity mistake: In Paris, when Dexter grabs the knife off the table in the close-up, he's wearing the black glove on his right hand, but it cuts to the wide shot and both of Dexter's hands are bare; then in the next shot the black gloves reappear. It's rather odd that the actor was even filmed without wearing his gloves in the wide shot.
Answer: The short answer is yes, it could. but, it would have to be set up to analyze results to differentiate species. The sequencer will report the base pairs for any properly prepared sample, but interpreting the results is a software package. The software is available, but I would think it unlikely that an analysis package used in a forensics lab would have the capability to be so specific. More likely it would report "Non Human Sequences Found."