I don't know. I'd definitely have them seen by someone, which he was. Having dizzy spells and vomiting a lot is also a sign of vertigo, which in the vast majority of cases doesn't mean the person has a brain tumor. That's what they thought he had. Also, BK other members of the coaching staff were in the hospital with him after the surgery. That isn't being disputed. The contact broke off after Brooks's family lawyered up, which was soon after the surgery, and I'm sure BK was doing that on advice of LSU's counsel.
If somebody is at fault here, it seems like it is way more likely to be LSU's training staff or the hospital. BK doesn't have the expertise or authority to know what to do about an injury or illness to a player. Part of the lawsuit is alleging that the surgeon at the hospital wasn't qualified to perform the surgery.
Again, BK is an obvious punching bad, which I get, but I don't see how this is his fault.