An applicable use of 'evil' for an animal, would be if you believe the animal 'knows better', eg a dog that knows right or wrong (in its way) but does something it thinks it shouldn't.
So I counter you with a practical question: can a crow commit a social transgression that will result in punishment by other crows? My strong suspicion is that the answer is yes, though I would love documentation as it would suggest a crow-cultural definition of morality
I was quite surprised to see that when I mock threatened my wife with a broom in his presence he jumped in to block. Not only that, he took the broom away from me and secured it away. I initially thought it was play, that he wanted to play with the broom. Seems he was just interested in separating me from the broom. He is our household saint.
We have a much younger dog (another rescue) who is not very nice at all to our saint. However, if my body language has even a hint of a threat to our little devil, he sure gets perked up and ready to protect.
This probably comes from pack behavior instinct. Fights inside a pack is bad.
Given that humans aren't obligate carnivores and further more, are capable of advanced chemistry so that even if they were obliged to eat other animals biologically they could just work around this without needing to kill anything - it seems much more compelling to judge us by such a metric than them. We decided that we liked steak so much we would deliberately raise cows just to eat them, the crow can't be anywhere near that "evil" if that's how we're characterising this outcome.