My brother is a contract lawyer. I showed him all correspondence of email and hard copy offer letter. Even though this is an "at will" employment situation, inVentive is still liable if you can prove that you passed on another employment opportunity or gave notice to your current employer since the offer states a starting date and an agreed upon salary. This constitutes a legal binding contract because the only contingencies are passing a background and drug screen. You can and should contact Sterling to find out if you have passed both background and drug screen. They will try not to tell you but by law they are required to and they know this. Check with Sterling via written request to get your info. If you have passed both then you have a "solid case". First thing Monday morning find yourself a lawyer and they will be more than happy to take this case. You have a very good chance at getting triple what you would have made from the offers you turned down, your current job that you quit, or the offer made by inVentive, whichever is the greatest, for three years since that was the agreed time of the inVentive contract. Example- inVentive offer was $80,000 x 3 years = $240,000 x triple damages = $760,000