Isabella died on January 26, 2012, a day after choking on a Hillsborough County School bus. Bella, a 7 year old student at Sessums Elementary, drove her power wheelchair onto her Hillsborough County School bus at 2:07 pm. Once on the bus, Isabella, who had a neuromuscular disorder, relied on an aide who was supposed to be trained to position her wheelchair with her head tilted back to allow her to breathe. "They were supposed to be trained by physical therapists at the school to slightly tilt her chair so her head would not bobble," says Isabella's mother, Lisa Herrera.