It was the summer of 2014 in sunny Tallahassee, Florida. The opening scene of a Shakespearean-like drama. Dan Markel and Wendi Adelson had recently divorced and shared custody of their two young boys.

In the fall of 2023, Colorado mother Kristil Krug was getting more and more worried. She had been receiving text messages that were getting increasingly more intense. They started out as insulting and ...