Joran, Where Are Your Sneakers?

I hope Greta ask Joran why were his sneakers even off his feet to be left at the beach. Then, why did he leave them? If nothing happened why didn't he have time to put them back on? Even if his ride came, why didn't he tell his ride, wait I need to get my sneakers?

Even if Joran didn't "murder" Natalee, he had something to do with her disappearance. If not him then His father Paulus did it.

Pauis and Anita didn't want him to do the interview with Greta. Yes, even his lawyer.

Is Joran so psychom he thinks he is smarter than all the police, lawyers, and viewers?