Ricin doesn't kill as quickly as shown in the series. It's a deadly, but relatively slow acting, poison that takes several days to take effect.
Even if the victims were overcome by ricin poisoning, they would suffer in agony for several days.
Even if the victims were overcome by ricin poisoning, they would suffer in agony for several days.
Jeffrey Barge, referred to throughout and whose death is the point of the exercise, is credited as Gabriel.