Former presidential aspirant and human rights crusader, Nazlin Umar, has joined a case seeking the prosecution of Mandera Governor Ali Roba over alleged misuse of public funds and abuse of office.

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Umar said the court should allow for Roba's investigation and prosecution since the office of the Director of Public Prosecutions (DPP) has allegedly refused to act.

The former presidential candidate further said that the constitution allows citizens to file for a private prosecution against government officials suspected of graft.

Speaking to journalists at the Milimani Law Courts on Wednesday, Umar said they would push to ensure Governor Roba and others allegedly syphoning taxpayers money are prosecuted.

"We are going to fight and defend the rights of Kenyans whose money is being squandered by people they elected as leaders," she said.

This is after a Mandera resident instituted a private prosecution against Governor Roba.

Simba Hasheem wants the anti-corruption court to admit graft charges against the Jubilee governor. 

He alleges that the DPP has failed to order for the governor's probe and prosecution.

Hasheem argues that he wrote to the DPP over alleged graft at the Mandera county government, but he is yet to get a reply.

Hasheem is accusing Governor Roba of allegedly hiring an ambulance from the Kenya Red Cross at a cost of Sh40 Million.

He is also accusing the Jubilee governor of fraudulently procuring armoured vehicles at a cost of Sh16 Million.

Hasheem wants Roba prosecuted alongside Okosh Abdullahi, Adan Ibrahim Hassan and Alinoor Mohamed.

The matter will be mentioned in court next month.