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.
Well, in the 'The Boston Strangler' true story, Albert DeSalvo was the main figure. He was able to gain access to the victims' homes, sometimes by posing as a maintenance man or something similar. There were multiple victims, and their deaths were quite similar in nature - strangulation. This led to a huge manhunt and a lot of media attention at the time. The police had to piece together different clues from the crime scenes to try and catch the perpetrator.
The Boston Strangler was a serial killer. He targeted women in the Boston area. He strangled his victims, often in their own homes. Albert DeSalvo confessed to being the Boston Strangler, but there has been some debate over the years about whether he was truly the sole perpetrator.