Why did 13 women willingly open their doors to the Boston Strangler?

Boston is being terrorized by a series of seemingly random murders of women. Based on the true story, the film follows the investigators path through several leads before introducing the Strangler as a character. It is seen almost exclusively from the point of view of the investigators who have very few clues to build a case upon.
The Boston Strangler keeps every mind human — it fights its subject at zero distance. The story fights on E8/E11 of the E0–E14 reality ladder.
Films fighting at the same level of reality, about the same things.
The same preoccupations examined at another scale — one mind versus a nation.