Magdelaine de La Grange [SEP] convicted of
, however, and after the arrest of Marie Bosse in 1679, the trial against her was allowed to proceed. 
Magdelaine de La Grange and Abbé Nail were sentenced to death for forgery and murder on 4 February 1679, and four days later they were hanged.
References.
- Anne Somerset - "The Affair of the Poisons: Murder, Infanticide, and Satanism at the Court of Louis XIV" (St. Martin's Press (October 12, 2003) )
Magdelaine de La Grange
Magdelaine de La Grange (c. 1641–1679) was a French fortune-teller involved in the "Affair of the Poisons". Her arrest in 1677 marked the opening of the official investigation. She appealed to François-Michel le Tellier, Marquis de Louvois claiming that she had information about other crimes of high importance. Louvois reported to the King, who told Gabriel Nicolas de la Reynie, who, among other things, was the chief of the Paris police, to root out the poisoners.