Strange giallo/crime directed by an italian musical producer (Pasquale Elio Palumbo) under the name of
Helia Colombo. It seems that it was released in italian theaters only in 1975.
Most of the cast is totally unknown to me, and very very likely under akas... who is Daiana Murpy? And Robert Trewords?

Anyway, some people used to believe that Joseph Arkin (first credit in the movie) was actually turkish actor Cuneyt Arkin, ma I can't see anybody in the movie with a resemblance with this actor, so it's probably a mistake from Imdb.
As you know, there was an italian super-8 of this one.