The Central Bureau of Investigation (CBI) on Monday questioned actor-turned-politician and chief of Tamilaga Vettri Kazhagam (TVK), Vijay (the mononym by which Joseph Vijay Chandrasekhar is better known), in connection with its investigation into the Karur stampede case, officials said, with many of the questions having to do with his delayed arrival the venue -- sparking chaos in an already restive crowd in a cramped area.