yitayningwut–
Upon further review, my point of “ain adam masim atzmoi rasha” is on shaky grounds here for the following reasons:
1) The original action probably doesn’t qualify as rishus. If anything, he would simply have to compensate the owner for the difference between leshmo and shelo leshmo matza. (If he claims that he actually switched the matza with outside matza, that may be more severe).
2) The “masim atzmo rasha” would be that he’s admitting that he is trying to steal. However, his attempted blackmail is (I’d think) g’zaila in itself, so you see he is a rasha as far as that goes.
I didn’t go thru the entire Tosfos yet, just the first couple of lines (where he distinguishes between aidus and shtar). B’n I will. I think I see where you’re going though – this case is aidus, not shtar.
Corrections:
1) “omitted” in the last paragraph of my previous post should be “committed” – although my point was probably understood, this changes the meaning 180 degrees.
2) The Tosafos in Kesubos ?”? ???? is on 18b. I looked at ?”? ??? on 18a for a couple of minutes before I thought to turn the page.
old man–
A possible answer to your question is that the blackmailer claimes he swapped out the leshmo matzos with non-leshmo matzos baked elsewhere.