I don't think that there is anything wrong at all with keeping bunnies outside; most of mine live outside.
I live in a large village, but in our area we have cats and dogs, which are predators, we have mice and rats, which carry illness and disease, we have had birds of prey, foxes, all sorts. All my bunnies live in very secure, strong, weather proof hutches that can not be penetrated by any sort of predator, unless a random tiger happens to stroll into my garden and pick a fight with a rabbit, which I will just have to hope doesn't happen.
I fully agree with munchkin. The people that have replied to you, including myself, have done so because they care about the welfare of bunnies. On here, bunnies come first. Yes, you are important too, and that is another reason that people have said what they did. I hate finding a dead body, I wouldn't wish it on anyone, and if I could stop you finding that dead body, I would, but all I can do is advise, for both your sake, and more importantly, the bunnies.
I just hope that nothing happens to your bun, I really hope it doesn't.