Do you have any proof that he didn't remain independent, or you just want to stir the pot? All I can see in that link is a newspaper saying "this guy got donations by someone we don't like, so he must be lying".
I see it's all video in that investigation, do the videos look like they've been manipulated?
I've found that for issues that are this extremely politically polarized and where there is this much misinformation floating around, the only way to really know would be to buy a plane ticket and go there. You can't trust any source.
A bit of a tangent but: this is how you keep secrets in the Information Age. You can't actually keep a secret, but you can fog up the air with so much competing nonsense that nobody knows what to believe and the secret is indistinguishable from noise.
I see it's all video in that investigation, do the videos look like they've been manipulated?