I am doing research on a book about an unsolved murder which happened in the summer of 1963 in a small western town. I was wondering what type of suppressor for a 22 would have been used at that time since the gun and the suppressor and the body have never been found. Other evidence had shown up and the person missing has never been found. In the trailer park, the trailers were very close together, but no one heard a shot. Has anyone any ideas as to what could have been used to muffle a gunshot back in those days?