Since I don't have the specific details of this 'Murder Upstairs' true story, it's difficult to give a comprehensive account. However, in general, true crime stories often have elements such as a crime scene filled with clues, witnesses who may or may not be reliable, and a police investigation that tries to piece together what happened. In this case, if it's an upstairs location, the layout of the building might play a role in how the crime occurred and was discovered. For instance, if it was an apartment building, other residents might have heard something but not realized the severity until it was too late.
I'm not entirely sure which specific 'Murder Upstairs' true story you're referring to. There could be many cases or accounts with such a name. It could be a local crime that made headlines in a particular area.