Estemirova was abducted at 8:30 in the morning from a street in central Grozny — a city in 2009 under the saturation security control of Kadyrov's apparatus, with vehicle checkpoints, informant networks, and surveillance infrastructure throughout. The white car carrying her crossed into Ingushetia before the alarm was raised. Working from what this operational profile implies about authorization and capability, identify the single most significant piece of physical evidence that would have been available to investigators in the first 24 hours and that — if genuine — would have definitively mapped the abduction route and identified the vehicle.