Imagine a crime scene, and what it might take to solve the case. Do you think about dusting for fingerprints? DNA collection? According to Kate Winkler Dawson, author of “American Sherlock: Murder, Forensics, and the Birth of American CSI” and associate professor of journalism at the University of Texas at Austin, the man we can thank for that approach is Edward Oscar Heinrich. In the early 20th century, Heinrich took the world of forensics from guesswork, confession, and coercion to a place of science and nuanced evidence. While some of his experiments have been discredited in recent years as “junk science,” Heinrich’s impact can still be seen in the way many crime scenes are evaluated today.