Satmar Rebbe:Mesira is prohibited either as lashon harah or as a rabbinic prohibition

Update: I published this several years ago but it is obviously still relevant. In a discussion of which crimes a person becomes invalid to serve as a witness, the Satmer Rebbe notes that in the case of mesira there is a dispute in the poskim what the sin the moser transgresses. He notes that the Panim Meiros holds that there is no Torah prohibition violated but that it is only a rabbinic prohibition even though we find that Chazal were more stringent with a moser then with all the Torah prohibitions and a moser is included with those we can lower into a pit to die. The Beis Meir disagrees with him and says moser in fact violates a Torah prohibition and it is included in the prohibition of lashon harah...