In a statement released to newsmen on Saturday, the former lawmaker accused the anti-graft agency of compelling him to declare his assets.
He described his detention for alleged extortion as unfair, unjust and a clear breach of his fundamental human rights.
Shehu Sani vowed not to be silenced by the Muhammadu Buhari-led administration even if he was framed or detained by state agents.
The embattled ex-lawmaker thanked Amnesty international, SERAP, HURIWA and others that called for his release from custody.
Shehu Sani said: “My incarceration for 30 days in the jail of EFCC was unfair, unjust and a clear breach of my fundamental rights and hence stands condemned.
“During my unjust stay in the EFCC cell, I was subjected to traumatizing interrogations. My Houses and offices were searched, they compelled me to declare my assets, they tried to subject me to polygraph lie detector tests, my accounts were blocked, my phone was seized all in the name of fictional “24” or “25” thousand dollar extortion.
“Any information planted in the media by the EFCC spokesperson while I was in their custody about me is outrightly false and nothing but a bacterial and fungal infested concoctions, typical of their style.
“Our Country will continue to be at the bottom strata of the Transparency International index as long as our anti-graft agencies only use their might and arsenal to crush ants while lacking the courage, the heart and the liver to confront the snakes, the vultures and the hyenas of the ruling establishment.
“They can frame me, detain me but can’t silence me.
“I shall abide by all the conditions of my bail and appreciate the courage, compassion and wisdom of the Court in granting me bail.
“In an ideal democratic state, all agencies of the government are obliged to operate within the dictates and the ambit of the rule of law or the nation leaps into tyranny.
“The rule book of Stalin, The manual of Hitler or road map of Mussolini should not be the guidance and the compass of the nation’s security and anti-corruption agencies in their quest to sanitize our country.
“I wish to thank all individuals and groups that have shown concern, support, solidarity and prayers during my 30 days of incarceration in the underground cell of the EFCC on the orders of its chairman.”