A protected witness on Tuesday presented visual evidence, which, according to the prosecution, proves the police officer Isaiah Murangiri Ndumba killed Rex Masai during anti-Finance Bill protests in June last year.

The photojournalist, codenamed GG for security reasons, tendered five photographs and a video clip that purport to clearly identify Murangiri as the man who pulled the trigger.  The visuals, recorded on June 18, 19, and 20, were described as critical evidence by the Independent Policing Oversight Authority (IPOA) and the Directorate of Public Prosecution. "As you can see from photos of June 20, 2024, will see the man, on his left hand, had a wristband with the initials 'Izoo', while the right hand had one with Kenyan flag art," GG told Milimani Principal Magistrate Geoffrey Onsarigo.

On the day Masai was killed, GG further provided photos showing that the suspect in a black cap, a dark grey short-sleeved shirt, blue jeans, white sports shoes, a black face mask, and a police walkie-talkie.

In the video, an officer is seen on June 19 in the middle of a group of protesters near the Intercontinental Hotel dressed in a light blue shirt and black cap, and holding a walkie-talkie.