- Emiliano Sala was exposed to carboxyhemoglobin before crashing into the English Channel early this year
- The Argentine forward was en route his new club in a private jet before the ill-fated crash
- Sala became Cardiff City's record signing when he signed a deal with the then-Premier League club
Late Argentine striker Emiliano Sala was said to have been exposed to flammable gas (carbon monoxide) before his plane crashed into the English Channel earlier this year.
The 28-year-old became Cardiff City's record signing after joining the then-Premier League side in a deal worth £15 million from Nantes in January 2018.
He was en route to the his new club in a private jet with his pilot, David Ibbotson, before losing control of the aircraft.
However, after toxicology tests were carried out on his body, it was revealed that the late striker was exposed to a high level of CO (58%) - which could have caused seizure and unconsciousness or a heart attack, according to BBC.
"A COHb level of more than 50% in an otherwise healthy person is generally considered to be potentially fatal."
Sala family's lawyer Daniel Machover of Hickman & Rose solicitors said the report raised further questions.
"The family believe that a detailed technical examination of the plane is necessary.
"The family and the public need to know how the carbon monoxide was able to enter the cabin. Future air safety rests on knowing as much as possible on this issue."
It would be recalled that Mr Ibbotson's body has still not been found seven months after his disappearance in the crash.
But it is likely he would also have been exposed to carbon monoxide, according to Air Accidents Investigations Branch (AAIB) lead inspector Geraint Herbert.
BBC further reported that investigation into the crash is ongoing and may not be ready for publication until early 2020.