1.   The defense, which subpoenaed Martz to testify, argued that if EDTA was present in evidence blood, that was a powerful sign the blood was planted.

2.   After he repeatedly testified that he found no significant levels of EDTA in the evidence blood, jurors stopped paying close attention.

3.   Martz said his tests never conclusively determined that the preservative EDTA was present in the evidence blood.

4.   They say the levels found in the evidence blood are so low as to be scientifically insignificant.