COLUMBIA -- A federal report has faulted the pilot for a medical helicopter for a crash in Georgetown County that killed all three people on board more than two years ago.

The National Transportation Safety Board released a report Friday that found that pilot Patrick Walters, 45, knew there were storms and should not have tried to fly to his home base in Conway after dropping off a patient at a Charleston hospital in September 2009.

Authorities said Walters likely got confused by low clouds and stormy conditions during the nighttime flight and lost control of the helicopter. It crashed nose-first.

Killed along with Walters were flight nurse Diana Conner, 42, and paramedic Randolph C. Dove, 39.