Julianna and Audrey come across a person who collapsed, who has no heartbeat, and who is not breathing. Since they are certified, Julianna runs to get the nearest AED, and Audrey starts CPR. When Julianna returns, she starts to follow the verbal instructions on the AED. What mistake did the girls make? Julianna should have assisted with CPR instead of getting the AED. They should not have assisted with first aid because they are not paramedics. Julianna should have followed the written AED instructions. They should have made sure that someone called 911 first.