You asked: "Then why did he first say he and the Kalpoe brothers dropped her at the HI?"
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Perhaps he was embarrassed that he left her alone, on the beach.
When it was clear that she had met with foul play, he and the two Kalpoes should have come clean. Instead, they kept lying, which is why all their motives are suspicious.
This is an Agatha Christie novel - except that Natalee is a daughter, a sister and a young woman who is still missing. Nothing else matters.
sp
No matter, an honest person
would tell the truth, (however
it appeared to anyone) and not
changed their story of events
and then involve their friends.
That said, there's a huge piece of this puzzle missing that NONE of us have hit on. It's as tho we are being led in one direction, when it's really another. Strange.
sw