State v. Brian D. Robins, 2002 WI 65, on bypass
For Robins: Craig W. Albee
¶37. The crime of attempt is complete when the intent to commit the underlying crime is coupled with sufficient acts to demonstrate the improbability of free will desistance; the actual intervention of an extraneous factor is not a “third element” of the crime of attempt, although it is often part of the proof. See id. at 39-42; see also, Hamiel v. State, 92 Wis. 2d 656, 662-68, 285 N.W.2d 639 (1979). There is no statutory defense of voluntary abandonment once an attempt is completed, and this court has declined to create such a defense at common law. Stewart, 143 Wis. 2d at 45-46.