I mean he could just not have expected to be murdered? If you're a whistleblower and truly expect there to be a high chance you get suicided, sure, you tell as

I mean he could just not have expected to be murdered? If you're a whistleblower and truly expect there to be a high chance you get suicided, sure, you tell as many people as possible, but if it's not something you think is likely to happen, just telling one friend seems reasonable.