Where can I report DOGFIGHTS?

[Ann]

Ok, someone posted a thread on another forum asking if anyone else likes to visit dogfights. Another person said he likes them too and they both talk about how they like to go watch them and stuff... They both live in the USA. I know dogfighting is strictly illegal in Sweden and I always thought it was illegal in the USA too, but now I don't know anymore...

If it IS indeed illegal, where could I report these two people? Any suggestions would be greatly appreciated because I want nothing more than for these people to be put in jail and for those dogs to be rescued.

Thanks