Yes, an accused service member, through their defense counsel, has the right to request that DNA evidence be retested by an independent laboratory. This is a fundamental part of the right to prepare a defense and to challenge the government’s scientific evidence. While the initial testing is usually done at the U.S. Army Criminal Investigation Laboratory (USACIL), which is a highly accredited lab, the defense is not required to simply accept its findings.
The defense attorney will file a formal discovery request and a motion for expert assistance. The motion will ask the military judge to authorize government funding for the defense to hire its own independent DNA expert and to have a portion of the original DNA sample sent to an accredited civilian laboratory for retesting. The defense must typically make a showing that this is necessary for their case, which is a low bar to meet when DNA evidence is central to the prosecution.
The results of the independent retesting can be crucial. If the independent lab’s results contradict the findings from USACIL, it creates a powerful “battle of the experts” at trial and can generate significant reasonable doubt. Even if the results are the same, the defense’s independent expert can still review USACIL’s procedures and data for any potential errors or alternative interpretations. This right to independent retesting ensures that the government’s forensic evidence is subject to rigorous, independent scientific scrutiny.