Blood Relatives - 1978 - 5/10
AKA - Les Liens de Sang

Somewhat overlooked Claude Chabrol potboiler of gruesome murder.
Cast is French, Canadian and English, setting is Montreal.
Female cousins, returning home from late night party, are assaulted, one murdered.
Detective (Donald Sutherland) starts investigating, focusing on family and coworkers.
Perhaps more sensational in its day, the narrative thuds, though sleazy sidetracks spice it up a bit.
Hairstyles and clothes are pure late 70’s, though no other cultural references.
Chances are, early on alert viewers will guess the slasher’s identity.
Might even guess the motivation.
Dud.