Amadi was charged by National Drug Law Enforcement Agency (NDLEA) on one-count of drug trafficking.
Justice Ayotunde Faji sentenced Amadi after he pleaded guilty and begged the court to temper justice with mercy and promised not to engage in crime again.
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Justice Faji said the prison term should begin from the date of his arrest and admonished him to use the jail period to turn a new leaf and become a better person.
Earlier, the prosecutor, Mr Jeremiah Aernan, told the court that the accused was arrested on June 18 at the Kirikiri Maximum Prison in Lagos with 200 grammes of the narcotics.
Aernan said Amadi was caught with the substance in his sandals, which he planned to hand over to his brother, whom he went to visit at the prison.
The prosecutor said prison officials who arrested Amadi said he hid the weed in the sandals he wore when he visited his brother who was serving jail term in kirikiri.
The offence contravened the provisions of Section 11(c) of NDLEA Act Cap. N30, Laws of the Federation 2004, he added. (NAN)