The Kohberger Claim That Even the Defense Team Called Appalling

The central allegation in "Broken Plea" is that the Ka-Bar knife sheath — the prosecution's key piece of physical evidence linking Bryan Kohberger to the murders through DNA — allegedly had chain of custody problems serious enough to be challenged at trial. It's the kind of claim that sounds explosive on a book jacket. There's one problem: the expert making it didn't include it in his own filed report.

Brent Turvey, a criminologist and forensic scientist hired by Kohberger's defense, says he discovered the alleged issue after he submitted his expert analysis to meet a court deadline. The evidence bag...