Schlecht v. Schiel
In Schlecht v. Schiel, 76 Ariz. 214, 262 P.2d 252 (1953), the plaintiff suffered damage after the defendant constructed a wall in a wash that diverted stream water onto the plaintiff's property during a rainstorm. 76 Ariz. at 217, 262 P.2d at 254.
The supreme court approved a jury instruction that stated that it was "not sufficient" for a plaintiff to show that a defendant caused some damage, but that the plaintiff must show "how much of the damage" was caused by the defendant or encounter a defense verdict. Id. at 219-20, 262 P.2d at 255.