For what guests pay they should get a larger more prominent flag. I don't know how large the beach is itself, but a half flag may not easily be noticed than one that actually flies
Taking
just the interview (as-is) into consideration, he woke up under attack from mosquitoes, never went to pick up his things which included his hotel key card for unknown reasons, went to his friend's room for his phone, and then supposedly went to his room
with no key card.
It makes one wonder if the "lost" key card was a flawed alibi creation especially if the door or hotel system was advanced enough to log entries when he was allegedly asleep or passed out on the beach for 4 hours.
Did he perhaps give the key card to someone else during the 4 hours before he was back on the hotel property? Assuming no premeditated moves, without the key card,
he could have gotten to his room, been unable to enter and then had to go to the front desk or
he would have thought to go back to the beach, where he last was to check on his things (he did not do that)- if he did indeed remember what happened before he woke up.
The interrogators could have perhaps asked him what he mean't by helping her breathe, was she already unconscious?
He claims he lost consciousness a couple of times, but somehow managed to get her to the beach and put her in front of him (contradicted by another statement). If one looses consciousness, and was helping someone one would let go of them or are those explanations for what his mind did not allow him to disclose or remember?