Once Upon A Dream

Last week, we discovered this bird in our yard while we were waiting for the bus. He was sitting under one of our bushes with a pile of feathers around him. At first we thought that he was injured, but as we got closer, we realized that he had caught another bird and de-feathered it. He had a clump of meat in his talon and flew over to the neighbor's fence. We have no idea what kind of bird he was. Any ideas?