Maybe -- for breach of contract. Sit down with an attorney that pursues such claims to learn of your possibilities.
In no way am I offering you legal advice, and in no way has my comment created an attorney-client relationship. You are not to rely upon my note above in any way, but insted need to sit down with counsel and share all relevant facts before receiving fully-informed legal advice. If you want to be completely sure of your rights, you must sit down with an experienced criminal defense attorney to be fully aware of your rights.
I think that you do have a possible breach of employment contract claim. You should consult with an expert Boston employment law lawyer. Request a free consultation, get 2-3 opinions from different lawyers, and then attempt to hire someone who has impressed you on a contingent fee basis.