Tilikums killings...

One day on Feb 21, 1991 during a show a former trainer Keltie Byrne accidentally slipped into the tank and was aggressively attacked and killed by Tilikum and two other orcas. Sealand decided to transfer him to SeaWorld Orlando. At SeaWorld Orlando, he was pretty much isolated most of the time. One day in 1991, a visitor by the name of Daniel P. Dukes dreamed of swimming with orcas. So he thought it was a good idea to stay after the park was close and take off his clothes to jump into one of the tanks. Unfortunately, he was discovered dead in Tilikum's tank. SeaWorld reported that he cause of death was because he had drowned but that wasn't really it. His body told otherwise. On Feb 24, 2010 during a shamu show called "Dine in Shamu a former trainer by the name Dawn Brancheau was supposedly pulled by her ponytail and dragged into the tank and killed by Tilikum. SeaWorld claims that Dawn at the time shouldn't have had a ponytail. They believe that was her mistake. But audience say otherwise, they reported that she was actually pulled down by her arm. Why is SeaWorld covering up for the animals attacks?