It's not that I'm necessarily ignoring everything. I just feel like a lot of what is being mentioned doesn't really count as evidence. It's seems to come off as an attempt to depict Hasan as acting in bad faith. Then using the bad faith explanation for what happened.
But the standard-of-proof to show he was shocking his dog would be to show that events can't be explained in good faith. Hasan may just may not have known it's a collar capable of shocking if he never used it, maybe it's another model that people identified, or was something set up by another trainer, etc... A lot of what is being presented as evidence isn't from independent investigations and can be easily be made to depict something scandalous.
The closest we have to a investigation is Taylor Lorenz in which she said she interviewed several witnesses and none of them alleged shock use or abuse.