The Spokesman-Review says Trooper Morgan Mehaffey first saw the pig running down a sidewalk in Spokane Valley in eastern Washington Friday after it escaped from a minivan through a broken window.
The trooper herded the animal out of traffic with his patrol car, pushing it back onto the sidewalk. Mehaffey then tried to slow the animal with his stun gun so some volunteers could rope it.
The paper reports that when that didn't work, the pig's owner told the trooper to shoot the animal.
Mehaffey says the owner had just purchased the pig for breeding.