DPP Noordin Haji has termed a decision by Sonko to nominate a deputy unacceptable.
He on Monday said the governor was in violation of his bail terms hence his action was null and void.
“The court was clear on what Sonko cannot do. To purport to have power to name a deputy while his case is still on is a violation of the bail terms given to him. We will move to court.”
Sonko nominated Anne Kananu Mwenda as the deputy governor.
In a letter to assembly Speaker Beatrice Elachi on Monday, Sonko said the decision is in line with article 180(5) of the Constitution and the Supreme Court Advisory of March 2018.
Kananu is the current chief officer for disaster and acting chief officer of water.
She was among the original chief officers who were vetted and approved by the assembly in April 2018.
She has survived the constant reshuffles until November last year, when she was placed as the chief officer for water in an acting capacity.
According to documents from the Nairobi County Assembly Archives, Ms Mwenda holds a Bachelor’s Degree in Criminology from the Dedan Kimathi University.
Before joining the public service, Ann worked as a Security Supervisor in charge of Quality Control and Training at the Kenya Airports Authority.
Born in 1980, she completed her high school education in 1999.
Her nomination comes two years after Polycap Igathe resigned, stating he could not continue to remain in office because he had failed to “earn the trust” of Sonko.
Sonko nominated self-declared general Miguna Miguna as deputy governor in May 2018, but the nomination was shot down.