Alright, so according to McDermid in Chapter 6 (Fingerprinting), fingerprints are unreliable because they sometimes require subjective interpretation (with blurred samples etc) but in Chapter 7 (Blood Spatter and DNA), a blood spatter expert's drawings are more useful than photographs in court because of her experience allowing her to highlight important elements? Methinks there's some subjectivity going on. I'm not saying expert opinion and experience isn't important, but be consistent about it.
Also, this sentence bugs the heck out of me:
"Twenty-nine people were murdered, including several children and a pair of unborn twins."
Were twenty-nine or twenty-seven people murdered, including the pregnant mother of unborn twins? (Or however you want to phrase it, you should not be including the unborn in body counts no matter how horrific and unfortunate it is). I'm assuming for this to even come up the mother was near term but still.