Suppose that a homeowner, Bob, had a contractor do some work in his attic. There was a fire safe in the attic with a couple thousand dollars in old coins. After the contractor left, Bob went into the attic and found that the fire safe had been broken open and the money was gone. When confronted, the contractor denied taking it. The only evidence that the contractor, specifically, broke into the safe was that it was discovered to be broken into shortly after the contractor left.
After Bob went to the police and was told that it was his word against the contractor's, he posted a negative review online recounting the facts. The review didn't directly say that the contractor stole the money, just that no one else was in the attic, no one else knew the money was there, and the money was gone after he left. Assume that Bob is telling the truth as he believes it.
Does the contractor have a valid claim against Bob for defamation (or any other claim)?