@truecrimevault13: A notebook became one of the most disturbing pieces of evidence in the Joel and Lisa Guy murder case. Investigators uncovered notes that prosecutors used to build their case against the couple’s son. In 2020, a jury found him guilty of murdering both parents. What do you think is the most important piece of evidence in a case like this? Follow for the final part. #crimestory #crimedocumentaries #TrueCrimeTok #TrueCrime #TennesseeCrime