Murder....suicide....accident?

My pops died a little more than 4 years ago, and till this day, we still don't know how he 'drowned'. But i know that there's been a lot of shady peeps and actions going on, and i need to know what the deal is. Okay, the dude that did my dad's autopsy said that there was no blood or cuts or anything, that it was pure accidental drowning. But in the pictures of his body the day they got it, he had a huge gash over his eyebrow. And the blood looked a deep red still.....they had found the body the day after his 'accident'. Thats only a start. My father had gotten a threat from one of the dudes in the village when he was in Ghana (thats where he was staying at the time). I had recieved a letter, which would end up to be the last one from my father, and it was short and fast written- i could tell. It seemed as if after he wrote my grandmother, telling her about the threat, and then written me, he KNEW something was going to happen, and had to get one last thing off of his chest. Could he have commited suicide having the stress of knowing someone wants to kill him? The crappy story that we got was that a huge wave took him out when the sun was rising, and he was sitting on a rock watching. Crap. Absoulute, utter crap. But anyway, some kid  supposedly went to the village to get help, but no one believed him, and when he came back ,my daddy was gone. That 'kid' had some sort of relationshiup with the crazy blond locked dude that wanted to kill my dad, so what about that? In the pictures it looked like he was hit in the head or worse....shot. My theory is that they did something to his head, and knowing he was dead, threw him in the  water. That's what i will remain to believe until further notice. And i know what yer thinking. Why did he want to kill him? That is a question that will remain unanswered for the rest of my life. But revenge is so satisfying. A few months after, that blonde lock dude was fixing  his car on the side of the road and a huge bus went by and hit him. Funny thing is, no one had ever heard of the bus company, and the people in the bus were never seen or heard of. Either thats a sick coinicendce, or just my father's sweet revenge.... you make the decision.