What happened to Natalee?

So it's been 12 years since Natalee Holloway went missing & recently there's a new documentary series on her disappearance. Obviously there have been a lot of leads and dead ends over the year, and a lot of controversy on what happened. There has been no official conviction or confession made & no body or proof of her has been found. My question is, who do you think did it? And what do you believe happened the night she went missing & the days following?