other because they were investigating his son. >> we're about a mile away from the hotel where natalee hollowayeen staying. and it was on this stretch of beach that joran van der sloot says that he left natalee early in the morning, alone. joran and the kalpoe brothers spent their summer in and out of jail. under interrogation, they changed their story dozens of times, but didn't get authorities any closer to the truth. >> there were many things they didn't do, small detail, big details they should have paid closer attention to. >> and this lack of willingness to push hard, you think, is because they were familiar with joran's father? >> i think so, i'm convinced of that. >> do you think he used his influence to protect his son? >> sure, because that is his son. he would have gone to any lengths to try to save him. he knew very well what happened. >> without more information, a judge released joran and the kalpoe brothers on september 3rd, 2005. >> the suspects who took my daughter from carlos n' charlie's on the last night of her senior trip, who are the last to be seen with her alive, are now