To
prove unlawful interference, a plaintiff must show: (1) unlawful, intentional interference with a plaintiff's prospect of, or reasonable expectation of, economic advantage, and (2) a reasonable probability that plaintiff would have received the anticipated economic benefits had there been no interference.
The elements a plaintiff is required to
prove are an intention to injure the plaintiff (might be a bit tricky) through
interference with the plaintiff's economic interests, made by
unlawful means (again, tricky) and resulting in economic loss.