I've had my money stolen from Poloniex. Contacted poloniex- they said they can't do anything.
At this point I know there's no way to get it back, but I just want to report it somewhere within the legal system.
Can I report it to FBI or the local Police?
Any other places/people to report to?
Start off by contacting your local authorities. They may have a cybercrime division that they can hand your case directly to, if not, they will refer your case to the proper agency. You want to generate a police report; you can claim the theft as a capital loss if you don't get your money returned. But bitcoin is no longer new. Police actually have ways to research intrusions, and the blockchain isn't so mysterious to law enforcement anymore. They will ask Polo for evidence, so if it was an inside job, it may come to light.
I'm sorry for your loss. And Polo is having a lot of poor customer experiences right now, it seems.