Were any of LaMia's other flights captained by someone other than Quiroga or was he the sole perpetrator of this tragic scam?
Flight Plans are submitted so that ATC can extract the information they require for ATC purposes. They are not required to be checked for accuracy of every entry though gross errors such as this one would, as we have seen, be picked up. And just suppose that was passed to the Tower and they refused to give start clearance, Quiroga would simply have said sorry thats an error, it should have read 0530, please change it and away they go.