I've yet to find anything to support your claim that Burnett demanded additional testing. I have found where
he said the luminol results required "strong corroborative evidence" to be admissible, but he doesn't say that evidence had to be in the form of additional testing there, let alone that any such testing could accomplish as much. Furthermore, as
I noted previously, more a more recent ruling found that "the surfaces on which the blood would have spattered were removed or cleaned within a day or two of the victim's disappearance" was considered sufficient corroborative evidence, and goes on to explain:
"The state relies on Arrick v. State, 107 S.W.3d 710 (Tex. App. 2003), in which it was held that the fact that the test is only presumptive goes to the weight, not the admissibility. The court noted that defense counsel was able to demonstrate the limits of what the test establishes and that the test result would help the jury understand and weigh the evidence. The court further held that the probative value outweighed the possible unfair prejudice. In State v. Canaan, 964 P. 2d 681 (Kan. 1998), the Kansas Supreme Court also allowed Luminol tests, holding that the fact that it can react to other materials goes to its weight, not to its admissibility.
The result of a Luminol test has been admitted in Florida, Johnston v. State, 497 So. 2d 863 (Fla. 1986); however, the issue addressed in Johnston was whether the police officer who testified as to the Luminol test was qualified to do so. The court held that the defendants objections to the qualifications of the officer went to the weight of his testimony, not his competency to testify as an expert.
Section 90.401, Florida Statutes (2003) defines relevant evidence as evidence tending to prove or disprove a material fact. Although the state must prove its case beyond a reasonable doubt, that standard does not apply to each piece of evidence. Delap v. State, 440 So. 2d 1242 (Fla. 1983) (medical experts opinion as to cause of death need not be within a reasonable medical certainty. It is still admissible, with the weight given it to be determined by the jury). Garland v. State, 834 So. 2d 265 (Fla. 4th DCA 2002) (test showing trace amount of gunshot residue, which was not forensically significant, had probative value)."