The footage, which surfaced online hours after the tragedy, shows the disturbing moment a county inspector fell from an upper floor inside the same building before it gave way the next day.
The clip has triggered public anger and fresh concerns about construction safety and accountability in the city.
The building, located along Kiganjo Muhoho Avenue, came down suddenly on January 2.
Rescue teams rushed to the scene as several workers and residents feared that people could be trapped under the rubble.
Up to four individuals were still unaccounted for as searches continued, with emergency crews working through the debris in shifts.
The CCTV video, believed to have been recorded during an inspection visit, shows a heated confrontation inside one of the unfinished rooms.
Loud voices can be heard in the background, suggesting that a disagreement was taking place.
A few seconds later, a man wearing a red shirt is seen falling forcefully from a higher level, hitting a wooden ladder before landing hard on the concrete floor. Pieces of timber and scattered construction materials surround him as he cries out in pain.
Despite clearly being injured, the man struggles to stand and limps out of the room.
Another camera angle captures him slowly making his way down the building before heading toward a police vehicle waiting outside. Shortly after he leaves the frame, officers are seen firing a tear gas canister toward the structure, a move that left many viewers confused.
Investigators have not confirmed what led to the incident. However, early reports suggest that the fall may have followed a disagreement between the inspector and individuals believed to be linked to the site’s developer.
Questions have also been raised about why the footage was released only after the building had already collapsed.
The National Construction Authority later identified the developer as Abyan Consulting Limited, which was also listed as the contractor.
According to the authority, the project had been registered in 2023 but was not compliant with safety regulations at the time of the collapse.
The video has intensified pressure on authorities to explain how such a high-risk structure was allowed to continue rising despite red flags.
Families of those still missing have also urged the government to speed up rescue efforts and release accurate updates.
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