Idaho murders DNA evidence helps police. But is it foolproof?
Last week, police announced that they had arrested Bryan Kohberger for the brutal murders of four University of Idaho students. After a week-long investigation, authorities zeroed in on Kohberger in part by matching DNA found at the crime scene with DNA from a relative of Kohberger's apparently obtained from trash in the family's home. With only limited information available, it is too early to judge the strength of the prosecution's case. But the role that DNA has already played has drawn renewed attention to broader questions about the uses and limits of this technology, and scientific evidence in general, in…
