@Mrsmith774 The Target: Jenck was working with the Fatui to steal research notes on Curvea sentient clockwork meka created by Dr Mosso LombrosoThe Incident: Jenck's actions led to the destruction of Curve during an attempt to cover up his crimes by attacking the Traveler Paimon and Talochard
@Mrsmith774 Yes, the Fatui Harbinger Sandrone (The Marionette) is implied to have had her subordinate, a civilian named Jenck, punished by having his tongue cut out and his mind broken.