Hope I'm wrong

So my neighbor comes out and hooks open his door. Tells me there's a bird in his house. So I'm sitting on the porch waiting for the bird to fly out. It doesn't. Neighbor comes out instead, shuts door and says it's gone. Goes around to the side of the house.

I didn't hear any joyous, I'm free now, kind of bird songs. Pretty sure I heard him open and close his garbage can before he went back in and the birds in the tree sound sad. I think he killed that bird. Weird.