He probably didn't. He called animal control on his neighbors after their cat scratched him. When he didn't encounter the cat again, he assumed it had been euthanized based on his complaint.
I think this is the same neighbor kid who Chris accused of releasing a snake into the hoard. He also believes the kid stole his old homework so he could turn it in at school and cheat his way onto the honor roll. Even if it wasn't all the same kid, these are all actual accusations Chris has actually made against children.
But the cat's probably fine.
This cat, however, is not.