This sounds like a episode from the show “Fear Thy Neighbor”.
In the show, it depicts real life stories of how neighbors who usually start off friendly become bitter adversaries over minor disputes which end up escalating to extreme violence — sometimes fatalities.
This is so ridiculous. Imagine losing your entire life about a cat. Also imagine doing about 20 to life about a cat.
I know neighboring can be extremely annoying & difficult sometimes. I wonder if there were previous issues leading up to this.