Canons can be resurrected if killed when they're not supposed to be. The Disturbing Acts of Violence Department covered this one once. The explanation for it is that the Canon character only thinks they're dead, but if the cause of death is fixed, they can be resurrected and put back into their homeworld as if nothing had happened.

... so speed and efficiency might just save the day :) And then you hang onto the resurrected canon somewhere, let the story continue, get all the charges, and then reintroduce them after exorcism and neuralysing or SUe slaying or whatever :D