1940s semi horror, driving me crazy for years

I remember this much, man who I thought was boris Karloff but no sure now, gets convicted of myrder. He is sent to prison but later found innocent. When released he goes after all the jurors and makes little dolls of them all before killing them. Googleing is impossible cus almost any description just returns 12 angry men. has to be from late 30s or 40s. many thanks if anyone can recall title of this little gem.