FAQ for
Caché (2005) More at IMDbPro »

This question is not answered and is open for interpretation. Michael Haneke said in several interviews, that he likes films which confuse him in some way (he named for example Pier Paolo Pasolini's Salò o le 120 giornate di Sodoma, but also the films of Robert Bresson and Andrei Tarkovsky in this context). Michael Haneke therefore deliberately "confuses" the audience by not resolving the story. He also pointed out that even though both Majid and his son denied any involvement in the tapes, they still could be lying. In Haneke's point of view, in the "real world" questions are not answered all the time. He is also known to be a critic of "mainstream cinema", especially the way it treats violence and that it almost always has simple and (arguably) superficial solutions to complex problems. It could also be argued that the audience are the stalkers (or, for that matter, the filmmakers), for we have been viewing and "spying on" their story for the duration of the film.