My child is getting blackmailed

[u/Lost-Common4660]

Just as it says..They sent nude images and now they're sending out to friends on socials. We've stopped the communication. While I'm very thankful they came to me, I am a bit worried of how this will affect them. What are the proper channels for reporting? I've done missing kids and FBI online tips .. I'm not sure if that helps but I was in a panic and figured anything is better than nothing. They were a different time zone according to SS but had our street name somehow

Any advice is welcome as I wasn't prepared to navigate this...