There's no reason to believe that Aegeline would cause severe hepatitis or death.
It's a significant constituent of Baal Fruit and I wasn't aware that acute debilitating non-vital hepatitis was widespread in India where it is consumed in the diet in probably higher doses than is contained in any of USPLabs supplements regularly.
Regarding the pesticide hype that has gone around.
Yes, essential oil of aegle marmelos leaves is used as a pesticide.
You would also know if it was in the products because being high in limonene they would smell strongly of citrus, and it is a skin and respiratory irritant.
USPLabs should have just skipped the aegeline name and the chemical nomenclature on and gone with 'Aegle Marmelos extract' and probablyt nothing would have ever been pointed towards aegline as a cause of this...