In a question put to viewers, 77 percent said they believed the Kenyan Army was responsible for the plundering of Westgate.

“Four-day siege or four-day shopping spree?” said one Western official working in Kenya.

Many questions are still swirling. The Shabab, a Somali Islamist group, has claimed responsibility for killing more than 60 people at the mall, but the number of militants who stormed in — and who they were — remain unknown.

On Thursday morning, at the Westgate entrance, vans usually used for taking tourists on safari disgorged a platoon of Western investigators wearing zip-off nylon pants and handguns on their hips. The mall reeked of rotten meat. Kenyan soldiers in hazardous-material suits and gas masks leaned over piles of debris, collecting evidence. There were still pools of blood on the floor, bits of flesh sticking to the tiles. Several more bodies were unearthed Thursday from a pile of rubble.

The mall’s electricity remained shut off, and inside Sir Henry’s, a men’s store on the ground floor, clerks took inventory by lantern light. Fazal Virani, one of Sir Henry’s owners, shook his head in disbelief. He pointed out that the cheaper suits in the front of the store had not been stolen, while dozens of his most expensive suits, hanging in the back and costing almost $2,000 each, were gone.

“These guys had time, man, these guys had time,” he said.

Mr. Virani then trudged upstairs to commiserate with other shopkeepers. “You get hit, too?” he asked a group of men standing ankle deep in crushed glass.