Hunt A Killer: A Wealth of Murder

From BoardGameGeek:

When six billionaires get together for a weekend wellness retreat to find meaning in their lives, their host's personal assistant, Tim, winds up dead. The other assistant there, Tim's friend Jill, now needs your help to uncover the truth about what happened and bring Tim's killer to justice. The only problem is, no one saw anything suspicious that night. At least, that's what they all say. Cash in your deduction skills to uncover which rich guest killed Tim! The gameplay features multiple codes and relies heavily on identification, close reading, and logic. All the evidence in this case is physical - no need for internet access, so you can take it with you anywhere. Rated 4/5 difficulty.