The National Transportation Safety Board will formally announce Tuesday the probable cause of the helicopter crash that killed Kobe Bryant and eight others.
Investigators have been working the case for more than a year ... but the NTSB says it will formally announce its findings at a virtual board meeting that will be live-streamed to the public on Feb. 9.
In the days following the crash, the NTSB said preliminary findings showed no outward evidence of engine failure.
Months later, NTSB officials said the pilot, Ara Zobayan, may have been disoriented when the aircraft was caught in deep fog.