My husband remembers a movie probably from the mid-1970s that had witches in it, and the big reveal at the end of the movie was that a detective was somehow involved. The female protagonist realizes this because of how he tied a knot. The knot may have been a hair ribbon on a little girl.
Might’ve been set in Massachusetts or New England, probably not New York City.
Not sure on a film but there was an episode of Columbo, An Exercise In Fatality (1974), where that was the clue that the dead person was murdered and wasn't an accident.
It dawns on Columbo after seeing a mother tie her daughter's shoelace and then realises the clue has been there the whole time.
Thank you! I'm sorry I didn't check back more frequently -- I'll run this by my husband and see if it matches up with his memory (although he definitely has a coven of witches in there somehow...probably not Columbo's usual quarry! haha). Thank you so much for responding.
I think you're looking for "Crowhaven Farm" with Hope Lange. There's a coven of witches who are basically haunting Hope due to something from the past, and at the end, she sees a "stranger", who is a policeman, tie a bow on a child, which causes her to realize who he really is (not to give everything away). This was on tv quite frequently in the 70s. In the NYC area, it was a staple of the "4:30 Movie".
I pulled it up on YouTube, and my husband is over the moon -- that's it!!!! You don't know the relief that's given him after wracking his brain for years.
He was so happy. I should've taken a picture of him watching it on YouTube. He can get his details mixed up sometimes, so solving this was especially satisfying -- thank you again! (Once he told me that there was a new season of "Last Train to Glasgow." Turned out to be "Last Tango in Halifax." LOL)