The Capitol has its own brand of subtlety, messages aimed at a specific person and perhaps missed by anyone not familiar with the situation. It's a reminder that they know everything, and that they have the power.

"Not everyone in the Capitol is enthralled by the lifestyle." He doesn't know what did it for these two, of course, but sometimes all it takes is something happening to someone they care about. The system isn't so beneficial when it targets one of your own, after all.