As a brief aside, howler monkeys may sound fierce, but they are actually non-aggressive vegetarians who live in family groups and eat tree leaves.
Child welfare agency PANI is looking into removing the children from the home, as there is no way they should have had access to rifles. What kind of penalty the children will face, as well as what will happen to the parents, is still in question.
I guess the only good thing that can be said about this incident is that it has raised awareness of how serious our need to protect endangered species is, even in a country as supposedly "environmentally-friendly" as Costa Rica purports to be (but that is a whole other blog entry).
A picture of a Howler Monkey in Costa Rica. Author: Daniel Chaves Gomez. Borrowed from Wikimedia Commons.