I'm looking for an old movie. Several planned murders happen. But only two has stuck in my mind.
An old woman is found, sitting in a sofa with a pair of knitting needles stuck through her neck in a cross.
A man gets shot by a shotgun placed in a cupboard at the top of a staircase.
I also vaguely remember a couple falling through a trapdoor when coming to the house, ending up in the coal cellar.
It could be one of these multiple murder mysteries. If I remember right it was black and white, but it could also be, I watched it on a B&W TV set in the late 60ies. I don't think it was a bloody movie more a mystery /suspense movie