Link to video of father shooting his child's rapist in airport while rapist in police custody? Anybody seen?

I saw this on couple different TV show reality clips in last 5-10 years but can't seem to find now. If I recall correctly, a father pretends to be on a payphone (on the left side of the screen). Then the police walk a man, accused of being the rapist/molester/murderer of the father's child (I think son), thru the airport and coming towards the camera. Then the father springs out from the payphone area and shoots the accused rapist. I can't recall whether the accused rapist dies or not. I think there was also a doentary style show on this story where they interview the father in prison. Does anybody know the names involved in this story or how to find a link to the video of this event? Thanks.