There might be a case where the victim had a very secretive lifestyle. This made it difficult for the police to find out who they associated with and what could have led to their murder. The podcast would probably talk about how the police had to dig deep into the victim's past, maybe interviewing old friends or colleagues from years ago. They might have found some long - forgotten grudges or relationships that could be relevant to the murder.
Another unsolved case is that of the Axeman of New Orleans. This serial killer terrorized the city in the early 1900s. He sent strange letters to the newspapers and seemed to have a specific pattern in his killings. But despite all the investigations back then and the continued interest today, the identity of the Axeman has never been discovered in the context of vh1 true crime stories.
Yes, many Unsolved Mysteries cases are inspired by real events and true stories, although some details might be dramatized for the sake of presentation.
They remain unsolved mainly because most of the evidence is anecdotal. People claim to see ghosts or experience paranormal activities, but it's hard to prove objectively. For example, in a haunted house, someone might feel a cold breeze and think it's a ghost, but it could be a draft. There's no scientific equipment that can definitively detect a ghost.
The unknown. For example, in the stories about haunted places, not knowing what is causing the strange noises or apparitions is terrifying. It could be anything, and that uncertainty plays on our fears.
In fact, 'Unsolved' takes elements from actual cases and weaves them into the narrative. However, some artistic liberties might have been taken for dramatic effect.