Salah Abdeslam, the only survivor of the November 13 attacks, is the subject of a prison regime like no other. Prison is an amplifier.

The slightest information, especially if it comes from television, spreads through corridors and walks at the speed of sound. “It was one of the first things my husband talked to me about when I saw him in the visiting room,” says Lina, a 24-year-old inmate’s wife. He watched the arrival of the convoy from the window of his cell.