A medical helicopter crashed on Highway 50 in Sacramento, critically injuring three crew members. Eyewitnesses report that bystanders quickly banded together to lift the wreckage in a heroic effort to free a trapped individual. The helicopter reportedly experienced violent shaking before the crash. Dashcam footage captured the moments leading up to the incident. Local authorities have identified the crew and confirmed that all three victims are in critical condition. The highway was temporarily closed following the accident, but has since reopened as federal investigators begin their inquiry into the cause of the crash.