(CNN) -- SeaWorld will resume killer whale shows while the company and two federal agencies investigate the death of a whale trainer at SeaWorld Orlando, company and federal officials announced Friday.





The shows, which were suspended at all SeaWorld locations after the death Wednesday at SeaWorld Orlando, will resume Saturday with new precautionary measures in place, said Jim Atchison, president of SeaWorld Parks & Entertainment.





Earlier Friday, the Labor Department's Occupational Safety and Health Administration and the Agriculture Department's Animal and Plant Health Inspection Service announced they were looking into the death of Dawn Brancheau, 40.





Brancheau was pulled underwater when a killer whale named Tilikum grabbed her ponytail. A source at SeaWorld said that after seizing her, the whale dove deep underwater. Trainers eventually had to wrangle the animal into a smaller pool before they could retrieve her body about 40 minutes later.





WESH: Watch tourist's video just before attack





A former head of animal training said Friday that Brancheau left herself vulnerable to attack and that she may have broken the park's training protocol.





"Dawn, if she was standing here right now, would tell you that that was her mistake in allowing that to happen," said former SeaWorld trainer Thad Lacinak, who had worked with Brancheau in the past, on ABC's "Good Morning America."





Lacinak called Brancheau "one the best killer whale trainers I ever worked with."





Still, he said, Brancheau should not have been lying in a slideout -- a platform covered by roughly 4 inches of water -- so close to a killer whale.





"When I was there we did have a protocol that you would not do that, you would not lie down in a slideout and get that close to his mouth.





"Now, whether she broke that protocol or not I don't know, or if the protocol changed in how they were working with him," Lacinak continued. "But I'm pretty sure it was her breaking the protocol."





Atchison said Friday that it's too soon to tell if Brancheau violated protocol.





"It's far too early to get to that point," the SeaWorld president said. "We're really still trying to collect information, trying to understand the nature and scope of the event."





He declined to discuss SeaWorld's training protocols, saying they are "proprietary documents."





Atchison had high praise for Brancheau and said a charitable foundation is being formed to support causes she was interested in.





He told reporters that video images in connection with the accident have been made available to the appropriate authorities.





Atchison said Tilikum "is a wonderful animal" and "will remain an active and contributing member of the team despite what happened."





"He's a very special animal that requires special handling. Obviously the procedures that we've had in place are something we're revisiting at this point," he said.





Tilikum's size and weight -- 12,000 pounds, compared with 6,000 to 9,000 pounds for the facility's other killer whales -- was one reason there were separate procedures in place for him at the Orlando facility.





When the shows with killer whales resume Saturday at Orlando and other SeaWorld parks, trainers won't get into the water with the animals. "Direct interactions" with the animals were suspended in all three SeaWorld parks after the death.





Various other improvements and changes will be enacted, Atchison said.





iReport: Photo taken moments before attack





Labor Department spokesman Mike Wald said the safety and health agency is looking into whether OSHA workplace standards were violated in the incident. It will complete a report within six months, he said.





If workplace infractions are found, OSHA will propose financial penalties, Wald said. If that happens, the company could accept the penalties and make any necessary workplace changes or appeal proposed penalties before an OSHA review commission.





David Sacks, Agriculture Department spokesman, said inspectors are looking into the incident from the animal welfare perspective.





The Animal and Plant Health Inspection Service wants to know if there were any violations of the Animal Welfare Act, a federal set of minimum
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