Docs, could a person die of chlordiazepoxide overdose?

Possible, unlikely: Benzodiazepines have very little lethal potential, particularly in healthy people. Large doses will cause people to sleep for prolonged periods of time, but do not depress respiration or gag reflex. In elderly or debilitated people, in those with severe lung or liver disease, and when combined with other CNS depressants (like alcohol, opiates) they can and do cause respiratory depression/death.