Did someone kill the Shasta Pack, California’s mysterious wolf family?

From the Sacramento Bee:

Nearly four years ago in the forests of California’s rugged northeast corner, two black and brown wolves had a litter of five pups in the shadow of Mount Shasta.
They became known as the Shasta Pack – the first known gray wolves to have offspring on California soil in nearly a century. The pups, shown frolicking in camera footage released by state wildlife officials, became a statewide sensation, even as local ranchers bristled at the new threat to their cattle.

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