Absolutely. I don’t remember if there was conclusive proof that he did it but most of us thought he did. I remember Dominic Dunne - who pursued OJ Simpson relentlessly - admitted he had sympathy for Blake.
I admired Blake’s acting chops but he got into heavy coke during the later part of his career and I remember so many bad reports out of the “Baretta” set. Another man who if he had kept to his first wife, would today be wealthy, healthy and working. But actors are often not very intelligent.
I knew little about him, although I did see “In Cold Blood”, which scared the daylights out of me.