Fox News True Crime Newsletter: Nancy Guthrie trail, Bryan Kohberger team fractures, Luigi Mangione morals

The article highlights recent true crime developments, including Nancy Guthrie's murder investigation pointing to a single abductor, fractures within Bryan Kohberger's defense team over public comments, and legal challenges in Luigi Mangione's case. It also covers cold case breakthroughs, a singer's dismemberment of a teen, and legislative debates on prison sentences for killers.