The timeline for Sunday night is tight because he had a plan. It's not like he was going to languish in Keanae. He had to put up appearances that everything was normal. Besides, he did go back on other nights to finish up.
As far as the "they", you'd have to be a pretty good friend to assist in murdering a pregnant woman. How do you keep quiet aboit something like that? It wasn't Danielle. She doesn't come across as the type.
I have never thought she does either, but Brooke seems to think there is something there, and alludes to her as the boat captain. I am only passing on that such comments are being made, but the boat mention resonates with the talk of the ocean disposal
Some accomplices come in after the fact when the murderer needs assistance covering up, out of loyalty.
If you follow crimes in Hawai'i, a lot of the more heinous crimes have been committed or covered up by more than one person. Dana Ireland, Ashara Evenstar, Yesuah Boerstler, Dante Gilman, Sequoyah Vargas, and now the possible new light shed on the rape and murder of a four year old on Kaua'i (cold case), decades later, of a second man.
Accomplices keep quiet in part because they are now culpable under the law. They protect themselves with the silence, not only their friend, lover, relative, etc..
