someone sent me a photo of the McCormick notes asking if it's 'crackable' — need actual opinions

ok genuinely asking the cipher-heads here, not trying to be morbid. a guy I know mailed me a printout of the Ricky McCormick notes and is convinced he's gonna solve them on a weekend. trying to talk him down with facts. background for anyone who doesn't know: 1999, man's decomposing body turns up in……