Holders of the positions serve a single non-renewable term of six years.
Rift Valley Coordinator Josephat Kaimenyi said the authority has gathered about 80 per cent of the evidence required to build a case against the officer allegedly responsible for the shooting.
The authority is mandated to probe police misconduct, deaths, and serious injuries caused by police action.
However, IPOA reported that it is unable to access more victims who have yet to record their cases.
Social media has been awash with differing casualty figures, with some claiming victims were carried away by officers and that their bodies were not at the mortuaries in the area or the city at large.
Twenty local and international civil society groups based in Kenya, under the Police Reforms Working Group, have appealed to the IPOA to probe police violations, urgently and in detail.
Masai, 29, died on Thursday evening from injuries sustained from a live bullet allegedly fired by police in Nairobi's Central Business District (CBD).
He warned that ignoring public sentiment could precipitate a severe social crisis. “If you don’t listen to the people, you risk pushing this country into an uncontrollable social crisis.”
Sgt. Rashid faces charges of murder contrary to Section 203 as read with Section 204 of the Penal Code for allegedly murdering the two on March 31, 2017.
The ODPP further directed that the case file be closed and the parties pursue civil remedy to solve the dispute.
According to witnesses, Hussein was arrested after engaging in a fight with a young man, whose parents reported the incident to the police.
The two, who were on a motorcycle, were killed last Wednesday after allegedly snatching a pedestrian's mobile phone in the area.
The Access to Justice for Victims of Torture project, funded by the UN, will address torture cases while protecting victims' rights.
Torture has manifested in the form of extrajudicial killings, enforced disappearances and, most recently, the suspected cultish activities of self-proclaimed pastor Paul Mackenzie.
They were demanding the deployment of the medical interns and payment of their post-graduate fees.
They say that despite following procedures, the finger is always pointed at them in case of wide media coverage and complaints from the public and politicians.
Constable David Mwongela was found guilty of killing 24-year-old Ahmed Majid in 2020.