I'm sorry for these losses! Bandit was very cute.
How long have you been keeping snakes? Did you breed these guys or take them on as non feeders with the hopes of turning them around?
Some snakes just aren't meant to be and don't make it. Make sure your husbandry is correct, and if it is, then it's not your fault.
It's all correct, i made the mistake i guess by buying them from petsmart, not that my little bandit was a mistake...but they had feeding charts and they ate, so i got them....my others ones, (rosie, dorky, candy and albie) i got from there also and they are all just fine....