Dead fish

I killed my fish.
The filter hadn't been working, so I just left it plugged in. Well, the bottom pipe thinger that hooks onto the filter came off somehow, so it magically came on out of nowhere yesterday while we were both gone, and when I looked at the fish tank when I came home, my white fish was sucked up into it. There was nothing wrong with him that I know of, and he was fine last night, so that means he died by the machine. When I unplugged it, he fell out of it, and his face was all pointy.
I feel like it's all my fault for keeping that machine plugged in, but I never thought it was going to start working again just like that.