The court shifted the burden of proof to the defendant to show it wasn't him—it was the other guy who shot the plaintiff during the hunting accident.
Plaintiff can’t distinguish which of the known group of the defendants is more likely cause of harm, but each is equally likely to be causal agent. Where it’s impossible to tell which defendant caused the injury, the burden of proof shifts to the defendants to apportion the damages between them.
Summers v. Tice 33 Cal.2d 80 (1948)
(Joint Liability When Hunting)
Plaintiff's action was against both defendants for an injury to his right eye and face as the result of being struck by bird shot discharged from a shotgun. The case was tried by the court without a jury and the court found that on November 20, 1945, plaintiff and the two defendants were hunting quail on the open range. Each of the defendants was armed with a 12-gauge shotgun loaded with shells containing 7 1/2 size shot. Prior to going hunting plaintiff discussed the hunting procedure with defendants, indicating that they were to exercise care when shooting and to "keep in line." In the course of hunting, plaintiff proceeded up a hill, thus placing the hunters at the points of a triangle. The view of defendants with reference to plaintiff was unobstructed and they knew his location. Defendant Tice flushed a quail which rose in flight to a 10-foot elevation and flew between plaintiff and defendants. Both defendants shot at the quail, shooting in plaintiff's direction. At that time defendants were 75 yards from plaintiff. One shot struck plaintiff in his eye and another in his upper lip.
It is argued by defendants that they are not joint tortfeasors, and thus jointly and severally liable, as they were not acting in concert, and that there is not sufficient evidence to show which defendant was guilty of the negligence which caused the injuries -- the shooting by Tice or that by Simonson.
Whether the judgment against both defendants may stand.
There is evidence that both defendants, at about the same time or one immediately after the other, shot at a quail and in so doing shot toward plaintiff who was uphill from them, and that they knew his location. That is sufficient from which the trial court could conclude that they acted with respect to plaintiff other than as persons of ordinary prudence. The issue was one of fact for the trial court.
We believe it is clear that the court sufficiently found on the issue that defendants were jointly liable and that thus the negligence of both was the cause of the injury or to that legal effect. It found that both defendants were negligent and "That as a direct and proximate result of the shots fired by defendants, and each of them, a birdshot pellet was caused to and did lodge in plaintiff's right eye and that another birdshot pellet was caused to and did lodge in plaintiff's upper lip." Implicit in such finding is the assumption that the court was unable to ascertain whether the shots were from the gun of one defendant or the other or one shot from each of them. The one shot that entered plaintiff's eye was the major factor in assessing damages and that shot could not have come from the gun of both defendants. It was from one or the other only.
When we consider the relative position of the parties and the results that would flow if plaintiff was required to pin the injury on one of the defendants only, a requirement that the burden of proof on that subject be shifted to defendants becomes manifest. They are both wrongdoers -- both negligent toward plaintiff. They brought about a situation where the negligence of one of them injured the plaintiff, hence it should rest with them each to absolve himself if he can. The injured party has been placed by defendants in the unfair position of pointing to which defendant caused the harm. If one can escape the other may also and plaintiff is remediless.
Ordinarily, defendants are in a far better position to offer evidence to determine which one caused the injury. It is up to defendants to explain the cause of the injury.
It should be pointed out that the same reasons of policy and justice shift the burden to each of defendants to absolve himself if he can -- relieving the wronged person of the duty of apportioning the injury to a particular defendant, apply here where we are concerned with whether plaintiff is required to supply evidence for the apportionment of damages. If defendants are independent tort feasors and thus each liable for the damage caused by him alone, and, at least, where the matter of apportionment is incapable of proof, the innocent wronged party should not be deprived of his right to redress. The wrongdoers should be left to work out between themselves any apportionment.
The trial court was justified in finding that the plaintiff did not assume the risk or act other than as a person of ordinary prudence under the circumstances.
Under the circumstances here presented, each defendant is liable for the whole damage whether they are deemed to be acting in concert or independently.