Former NBA Player Murdered at Sea

Bison Dele, an ex-NBA player who walked away from it all at the prime of his career, his girlfriend, and the captain of his catamaran are all missing when Bison's brother docks their boat. What does his brother know about what happened to them all? 

Sources: 
1)https://en.wikipedia.org/wiki/Bison_Dele#:~:text=Dele%20won%20a%20championship%20with,have%20been%20killed%20by%20Dabord.
2) https://www.nzherald.co.nz/nz/mystery-nz-woman-link-to-mid-sea-triple-killing/6J7QWIE3B5FUCS4X6NOBRV5DVI/
3) https://www.sportskeeda.com/basketball/news-what-happened-bison-dele-cause-death-late-nba-player-explored
4) https://www.sportscasting.com/news/the-mysterious-life-and-murder-at-sea-of-nba-champion-bison-dele-aka-brian-williams/
5) https://www.cbsnews.com/news/cops-believe-ex-nba-player-was-slain/
6) https://abcnews.go.com/2020/story?id=123837&page=1