Is Peggy Sweeney a Victim of the Booker Martin Murders?

"There's no way she was there for the Booker Martin murders that's not part of the mo right" "It seems like a really good suspect until you take out everything Peggy says and because of what we know about her maybe mental capacity I'm not sure we can really trust anything she said initially about Yule's involvement" 'I think he would have been convicted based on the evidence even if they had sort of gotten her to testify'