Additionally, the internet is international. There's no guarantee that the people sending or demanding the pictures are anywhere in the US, and laws differ between states, let alone countries. What can the police do if the perpetrators are in Slovakia, or Singapore, or Sri Lanka? What happens if the pictures are taken, and sent from, a country where the age of consent is 14? (Yes, there are some.)
While we all here might agree that what's happening is despicable, the powers of law enforcement to control it are limited.

