The sort of &quot;DNA analysis&quot; discussed in the article is old technology. You just test multiple samples for the occurrence of some set of marker sequences, and then estimate the probability that matching occurrence could be due to chance.<p>So you&#x27;re comparing a suspect&#x27;s DNA with DNA from a crime scene. And you find the same set of marker sequences. But maybe the crime-scene DNA is a mixture. However, with a mixture you&#x27;d expect to see additional marker sequences in the crime-scene DNA.<p>But it depends. Many of the marker sequences are racial. So maybe it&#x27;s more likely for two people of a given race to look like one person. And maybe there was racial bias in marker selection. It&#x27;s a mess.<p>Bottom line, with current technology, people should not be convicted based on the occurrence of marker sequences. Nothing less than complete DNA sequences should be admissible.