To a certain extent, it's a true story. But like many such tales, it may have incorporated some fictional elements to make it more engaging or to fill in gaps in the known facts.
I'm not sure specifically what the 'cecil original story' is as there could be many stories with that name. It could be about a character named Cecil, perhaps his adventures, relationships or some unique experiences.
Cecil could be just an ordinary person with a passion for the supernatural. He might be someone who has had some personal experiences with the paranormal and decides to share those through ghost stories.
The Cecil Hotel has a rather dark and disturbing real story. It was known for various tragedies. There were multiple murders and suicides that took place there over the years. One of the most infamous cases was that of Elisa Lam. Her strange death in the hotel's water tank brought international attention to the Cecil. The hotel had long been a place with a seedy reputation, housing transients and people on the fringes of society, which contributed to the high incidence of such tragic events.
Well, Cecil the lion. He was a famous lion in Zimbabwe. In 2015, this poor fellow was killed. A hunter, Walter Palmer, managed to get him out of a protected area and shot him. It was a huge deal because Cecil was important for conservation efforts. He was being monitored for research. People all around the world were really angry about it. It made a lot of people think more about how we protect wild animals and the problems with trophy hunting.