[Z]

I wonder how long he'd been living next door to them and if he knew the context of why they had the dog? The girl died in 2008 from reading the OP so I just wonder if he had only recently moved in next door and just couldn't handle the yapping dog and was unaware of the back story? Not that it's particularly relevant, if you're capable of drowning a dog and cutting it open to remove its microchip, you're hardly going to stop and think about it if there's a sob story behind why they have the dog, but still... he should be doing time for this and this is exactly the kind of state of mental health that shouldn't be allowed to fly a plane.