The sole survivor of a 2008 medical helicopter crash in Prince George’s County that killed four people is suing the government, alleging that air traffic controllers were unresponsive and didn’t provide sufficient support to the flight crew.

The lawsuit, filed by Jordan Wells, who was a patient on the flight, says negligence on the part of Federal Aviation Administration controllers led to the crash that killed pilot Steven Bunker, flight paramedic Mickey Lippy, volunteer paramedic Tanya Mallard and fellow patient Ashley Younger.