It's doubtful that Adeline is a true story. Many fictional works bear similarities to real life but are not direct representations. Chances are, this is a made-up tale designed to evoke emotions and thoughts in the readers/viewers.
Well, the story of Haunting Adeline involves a series of paranormal experiences linked to Adeline. There are hauntings, unexplained phenomena, and a sense of dread throughout. The plot keeps you on the edge of your seat.
I'm not sure specifically which 'Adeline Horse' true story you are referring to. There could be many stories involving a horse named Adeline. It might be a local story, a personal account, or something relatively unknown without more context.
I don't know the details of 'True Story'. Maybe if we look into the plot, the characters' motives and the evidence presented within the story, we could figure out if Carlton killed the girl. But just based on this one - line question, I can't give a definite answer.