The convict is reported of supplying narcotics to the inmates.
Nankpa who was attached to the Ankaful Main Camp Prison in the Central Region was arrested in August 5, 2017, when he tried to throw cannabis over the prison walls to the prisoners.
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Nankpa is guilty of processing and hurling quantities of the banned substance into the Ankaful Maximum Prisons, according to the presiding judge Justice Afia Amankwaa.
The convict is reported of supplying narcotics to the prisioners.
He was jailed by the Cape Coast Circuit Court 3.
The presiding judge, Afia Amankwa said the prison officer has the duty to reform prisoners adding that he should have known better as a law enforcement officer.