>> reporter: this was the 16th time sirhan sirhan had been considered for parole. but this time was different because a los angeles county prosecutor elected late last year has a new directive for his office not to attend parole hearings. in talking with prosecutor george gas cone's office, we learned this is a executive decision based on the inmate's reactions to the crime, not just on the crime itself. the parole board did spend time asking sirhan about his remorse, rehabilitation. and seeing whether and how he had changed over the course of 53 years in prison. sirhan says he does take respo...