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Physical Evidence
DNA Stain Samples from O'Keefe's Jeans (Items 7-1.2.1–7-1.7.1)
Jeans stains analyzed by Porto supported O'Keefe's inclusion in both trials. An unstained exterior control area yielded a four-contributor DNA mixture.
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Porto reported O'Keefe inclusions in the stained samples at extremely high likelihood ratios. The stains contained two to three contributors, and the unstained exterior area contained four contributors; the other contributors were not identified in his testimony. On cross-examination, Porto said he was not asked to compare the jeans-stain profiles with Brian Higgins or Brian Albert. That testimony limits Porto's assignment and reflects counsel's challenge to the scope of the comparisons; it does not establish that no comparison was requested or performed by other investigators or laboratories.
Extracted stain samples A through E from the upper right leg of O'Keefe's jeans (Items 7-1.2.1 through 7-1.6.1) and an unstained control area from the exterior (Item 7-1.7.1), analyzed by DNA analyst Andre Porto in both trials. Stained samples yielded O'Keefe inclusions with likelihood ratios ranging from hundreds of septillions to one decillion; the unstained area produced a four-contributor mixture.