Wait, sorry, are people here of the opinion that he actually killed himself all on his own?
He filled a bag full of stones and put it on. Then he managed to get into a sack with a gun, perched on a bridge or structure over water, and managed to zip-tie the top of the sack, and get his arms out to fire a gun at his head and drop the gun somewhere mysteriously where it wasn't found, while he fell into the river and drifted off.
So, he's in a sack with a bag of rocks on, perched next to water. First of all, consider the fact that he had to get into a sack. Which is not easy.
Then he had to mess around with zip-ties, without falling. Despite the fact he would have almost no grip on whatever he was standing on.
And he did this without falling in?
He also managed to zip tie the sack from the inside, but have a hand out to aim a gun at his head?
And then he managed to shoot himself and drop the gun outside the sack where it was never found.
Yeah, that is just too unrealistic to have been done by one person on their own with no help, or without it having been a murder.
Compare the ease of doing all that to actually shooting a man and then stuffing him in a sack and throwing him into a river.