Stupidity: Dexter's decision not to kill Trinity when he had the chance eventually led to Rita's death, a mistake Dexter told Deb he would never make again. However, at the end of this episode, he decides to spare Oliver Saxon so Deb can arrest him. Dexter doesn't stay to ensure that Deb successfully has Saxon in custody, which leads to Saxon escaping his shackles with the unwitting help of Deputy Marshal Clayton, and shooting Deb before leaving the scene. Dexter therefore does make the same mistake again.
Stupidity: After Dexter tells Hannah that the U.S. Marshals have distributed her picture everywhere, she questions how she will be able to flee Miami for Argentina. Dexter reasons he and Harrison can leave with her because the authorities won't be looking for a woman traveling with her "husband and child." It doesn't matter who she is or isn't traveling with. If the authorities have shared her picture, she's going to be flagged when she goes through security at the airport, which Dexter should certainly know. This is made all the more egregious when she takes Harrison to the hospital later in the episode and is ID'd by the receptionist.
Stupidity: Dexter keeps evidence of his murders in his apartment, but never thinks to have any kind of security system such as motion detectors and cameras. This is especially egregious given that 1. The first rule of Dexter's code is to not get caught. 2. Sgt. Doakes broke into Dexter's apartment and found his blood slides, and very nearly used them to prove that Dexter is a serial killer, and 3. Dexter discovered that Stan Liddy bugged his apartment.
Stupidity: Hannah spends the entirety of season 8 as a fugitive in hiding, but never thinks to make herself less conspicuous, such as dyeing or cutting her hair, or wearing disguises when she goes out in public.
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."