I agree with MossRoad. Conspiracy theorists like to link animal sightings and population growth in an area to some "secret" government project. You know, "The timber companies introduced wolves/alligators/some-other-predator to control the beaver numbers to keep them from flooding so much timber." Or, "The insurance companies introduced wolves/big cats/some-other-predator to control deer numbers because of all the car-deer accidents." But, in most cases, I think there are more plausible explanations. The pictures of the cougar above immediately make me think that it's someones pet that escaped or was released after the owners didn't want to or couldn't care for or contain it any longer. Wild cougars, whether ones that migrated to an area or ones that are introduced by biologists to an area, just don't come up on people's decks. On the other hand a cougar that has been someone's pet would be well accustomed to human structures and would be conditioned to expect food from humans. Hence, when they get hungry, they go looking for a human to feed them.
Rumors of big cats, wolves, etc. being in parts of Alabama come up from time to time. Now, I have no doubt that there are some out there. But, I'm of the opinion that there isn't a viable population of wolves or big cats in Alabama. And, the ones that are spotted from time to time are someone's exotic pet that has escaped.
[Side note] I know a gentleman that has a stuffed wolf that was killed on his property in LA (Lower Alabama

). IIRC, his nephew shot it as it was chasing an adult doe across a field. There's no doubt that it's a wolf. Back in junior college, a local farmer had shot a canine creature that was harassing/killing his cows. The rumor got started that it was a wolf or wolf-hybrid. I went and got the carcass and took it to my professor. He took me to the guy's house to compare it to the wolf. Once you've seen a wolf, there's no mistaking a coyote or dog for a wolf. That thing is long and lean. Probably waist high to a grown man at the withers and every bit of 6'-7' from tip of nose to tip of tail. The critter harassing the cows was simply a feral dog (with a significant amount of Chow-chow in it's ancestry).
Now, I know there are legitimate programs where large predators (wolves, big cats, etc.) are being reintroduced to some areas. But those are isolated and relatively rare instances.
Later,
BR