The facts you have stated describe an unlawful eviction as well as conversion (civil theft/destruction) of personal property. It's a Class A misdemeanor to evict a person from a residential apartment "unlawfully", including by removing their personal belongings or changing the locks (without providing a new key). But, while it's possible to call the police and ask for their assistance, the police are not always able to (or interested in) helping evicted tenants.
If your main goal is to be restored to possession, your best bet probably is to bring an illegal lockout proceeding in the Queens County Civil Court of the City of New York. It is important to do this as soon as possible. If you convince the judge at a trial of all the facts you stated and the roommate cannot provide an adequate justification for her conduct, you may be entitled to a judgment that permanently restores you to possession. If your main goal is to recover money damages from your roommate, you can begin a civil lawsuit in the Queens County Supreme Court of the State of New York under RPAPL 853, which authorizes treble (x3) damages, and in addition to suing for conversion for the value of your discarded personal belongings, you also may be entitled to recover attorney's fees and the costs of litigation.
In my opinion, you have a genuine and serious legal problem, and I urge you to retain an experienced landlord-tenant attorney promptly. Please send me an email if you would like to discuss your rights further. Either way, I wish you the best of luck.
Simon W. Reiff
[email protected]