(CNN)Argentine footballer Emiliano Sala and his pilot were exposed to high levels of carbon monoxide inside the cockpit of their plane before it crashed into the English Channel in January, investigators say.
Sala and David Ibbotson were traveling from Nantes, France, to Cardiff, Wales, when their Piper Malibu aircraft crashed, killing them both.
The 28-year-old had joined the Welsh club for a reported £15 million ($19.3 million) from the French side and was heading to Wales after saying farewell to his former teammates.
