Within the voodoo religion, the concept of dual soul is present and is closely linked with the figure of the zombie. There are at least two types of soul according to this tradition: the Gros Bon Ange (good wide angel) and Ti Bon Ange (little good angel). The first type of soul, Gros Bon Ange, is a spiritual concept. Memory, feelings and personality of the person is attributed to it. This soul is in direct relation to the body. If Gros Bon Ange is lost, it is like losing life.
The second type of soul, Ti Bon Ange is another spiritual concept. It is linked to the brain, blood, head and conscience of man. This type of soul represents two types of zombie:
1. Disembodied zombie. His absence in person indicates stealing by sorcerer or Bokor. It is typically stored in a specific container. It is the soul without a body.
2. Corporeal zombie. It corresponds to the person with the appearance of dead. It is the typical zombie recognized by all. It is the body without a soul.
Both types of zombie work as domestic servants. A disembodied zombie, within the Haitian oral tradition, can also be used to kill someone, to make someone sick or destroy crops. There are versions in which the sorcerer sucks the soul of the victim through a crack in the door of his house, and then he transfer it to a bottle or jar. Then, the person falls ill, dies and is buried. subsequently, the wizard asks permission from the caretaker of the cemetery to remove the body and thus put under his nose the bottle with the sol of the victim, while a special drug is administered. It is would be another way to do the zombie process which is more magical character, rather than toxic.
Source: Acevedo, Zombie Factor