His palm print in that location would not be unlikely given that history. The primary issue became whether one could determine if the blood was deposited before or after the palm print. She dutifully wrote a completely useless report that the stain in question was human. Fortunately, someone had the foresight to take excellent photomicrographs before the analyst destroyed the evidence. The denouement of this exam is another topic.
Technicians perform analyses when requested.
You will not get the right answer if you do not ask the right question, no matter how brilliant your examination. And knowing as much as you can about the case will assist in asking relevant questions. Because we are all human, we cannot help but have our own personal and professional prejudices. But one key to a competent professional life is understanding your own limitations and biases, and taking them into consideration in your work. So on to the specifics of DNA and RFLP band interpretation.