AURORA --Investigators say they've turned their attention to the pilot as they look into the cause of the medical helicopter crash that killed four people in Aurora.The National Transportation Safety Board is checking Del Waugh's work on similar medical transportation missions. Waugh, two crew members and a 1-year-old patient died in the crash.
Waugh was a veteran pilot. Investigators says there's no indication of a helicopter malfunctions. And lights were operating properly on the tower struck by the chopper.
A final report is unlikely to be issued for several months.