I WONDER - Who Is Cerberus?

The video discusses Cerberus, a three-headed dog from Greek mythology, known for guarding the underworld. Cerberus prevents souls from leaving the underworld and plays a role in judging the guilt or innocence of souls entering the afterlife. Guilty souls are devoured, while the innocent proceed to the afterlife.

How did Cerberus determine the fate of a soul entering the underworld?

What happens to guilty souls when they encounter Cerberus?