The punishment should be... To let little Landon decide, or even to do it himself, as soon as he’s able, with the understanding that no punishment is off the table. If only there were justice in this world...
While it might be satisfying to make a public example of him expiring in some painful way, just removing the problem swiftly and permanently is effective. Also, people's imaginations would run away with them - what *did* really happen to him??? ... only one or two people would really know if he screamed and cried like a little girl, begged for mercy, lost control of bodily functions etc. But everyone would wonder.