This is an interesting problem we have. How the press, politics, and the courts can interact to distort an issue is fascinating. The press needs to get people to read their papers or watch their newscasts, so they report anything that seems slightly sensational. They also report items that are true (so there can be no accusation of libel), but are not fully explained, causing the reader to infer other "facts" which often turn out to be falsehoods. A good example is found in the cited story, which mentions both the accident and the ride's 80 mph top speed close together without mentioning that the striking train was moving far slower at the time of the accident. How can the average reader fail to infer (wrongly) that the striking train was moving at close to 80 mph when the accident occurred? I'm not trying to state that this is done intentionally, but one would think that professional journalists would not make this type of mistake frequently if they were trying to avoid it.
The press having inflamed the public, the politicians now step in to get their coverage and score their points with the voting public. How can a politician go wrong jumping on an issue that the public now misunderstands due to the press's zeal for publishing sensational stories?
Finally, while the parks may indeed have something to hide (doesn't everyone?), they must protect themselves from our litigious society. Anything they disclose to the public regarding an accident investigation may be seized upon by attorneys representing the victims. The disclosed information may possibly be used out of context with other facts of the case, resulting in a jury forming the wrong impression of the truth. It's unfortunate, but when misunderstanding can lead to multimillion dollar court judgments against corporations, it's only smart for those corporations to be wary about what they disclose.
If Six Flags negligence significantly contributed to the likelihood or severity of this accident, I hope they are appropriately held accountable. I also hope all the accident victims are compensated appropriately. But let's base those decisions on the actual facts of the case, not on speculation and hyperbole.