In shows like Poirot or Elementary or CSI or hundreds of other murder-of-the-week shows the reason that it has to be murder is because that creates a sense of great urgency and allows for some rule-bending: what's a little burglary or emotional manipulation when Rick Castle has to solve a murder
In the real world I think it quickly becomes distasteful to speculate about a gruesome crime with only the limited clues the podcast gives you.