70's sexploitation

[Dany]

Hi everyone!
I listen to a Danish podcast, and in our Facebook group, someone asked a question. No one has been able to answer, and so I remembered this place from way back. Here goes:
Sexploitation around 70's. Masked murderer. Kills (his?) victims mostly by strangulation, but also by stabbing. The poster remembers that the sweaters (mostly turtlenecks probably) of the victims, who were female, would climb up to reveal (always very large) bare breasts.
It was a very badly produced/directed movie.
Thank you very much in advance! If anyone knows this, I promise to tell them where (and by whom) I got the information.