I am a lawyer in CT and practicein this area of the law.  Employees at will may be terminated for good bad or no reason at all.  if your employer wants to fire you for whatever reason, short of violating a public policy or discriminating, he can.  In other words, regardless of whether or not you were convicted of larceny or disorderly conduct, the fact that you were arrested and convicted of some charge is sufficient reason for the employer to not want you working there.  I know its not what you want to hear, and I am sorry.