Sure is. The story of the Boston Strangler is a factual one. It's a well-known and documented part of criminal history. Many books and films have been made about it to recount the terrifying events.
Definitely a true story. The Boston Strangler's case was widely covered in the news and documented in historical records. It caused quite a stir at the time.
There are various menacing characters in Stephen King's works. However, without more specific context, it's hard to pinpoint a single 'the strangler'. King has many antagonists who could potentially be killers or stranglers in different stories.
In Stephen King's universe, if there was a character that could be considered a strangler, they would likely possess the characteristics typical of his villains. They'd probably be stealthy, able to blend into the background until they strike. Their minds would be warped, perhaps by some supernatural influence or a traumatic event in their past. They would also be persistent in their evil deeds, not easily deterred from their goal of causing harm, especially through strangulation which is a very personal and brutal form of violence.
Well, the real Boston Strangler story involves a series of brutal murders in Boston in the 1960s. Albert DeSalvo was linked to these murders. He entered the homes of his victims, mostly women, and strangled them. The police investigations were long and difficult. DeSalvo's confession was a major turning point, but it wasn't without controversy. There were questions about his mental state and whether he was pressured into confessing. Also, some forensic evidence didn't seem to neatly match up. This case has left a lasting mark on the city and the study of serial killers, and it continues to be a topic of much debate and research.