Wis. Stat. § 940.08
The common law "year-and-a-day rule" that no homicide is committed unless the victim dies within a year and a day after the injury is inflicted is abrogated, with prospective application only. State v. Picotte, 2003 WI 42, 261 Wis. 2d 249, 661 N.W.2d 381, 01-3063. In order to establish that the defendant was guilty of the crime of homicide by negligent handling of a dangerous weapon under sub. (1), the state had to prove three elements beyond a reasonable doubt: 1) the defendant operated or handled a dangerous weapon; 2) the defendant operated or handled a dangerous weapon in a manner constituting criminal negligence; and 3) the defendant's operation or handling of a dangerous weapon in a manner constituting criminal negligence caused the death of another human being. State v. Langlois, 2018 WI 73, 382 Wis. 2d 414, 913 N.W.2d 812, 16-1409.