By Beth Hardie & Jane Lavender An experienced Seaworld trainer was killed by an orca she had worked alongside for years and her grisly injuries included a severed spine and broken jaw, while her hair and scalp was found at the bottom of the pool. Dawn Brancheau loved all animals and felt a special affinity to the majestic and stunning orcas. For 15 years, the 40-year-old had lived out her dreams and was working with orcas at SeaWorld in Orlando, Florida. Being a trainer at the world famous attraction was something she had dreamed of since she was a child and she was one of the most senior ther…