I'm a restaurant manager , and I have a problem employee. He is the only employee, out of a dozen, I have to criticize or discipline. Knowing that I was a student last year and that I'm applying for PR, he subtly threatened to call CIC and try to create problems by telling them that I don't perform the job of manager and that my only duties are getting payments and doing deliveries. Basically, he wants to undermine my job letter since he has no other way of attacking me. Would CIC investigate and unsubstantiated claim like this? Could this derail or delay my EE application?