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New developments in the investigation of the carambol on Bulgaria's Trakia highway suggest the Romanian truck driver is not at fault for the initial collision. Initially detained, he was released after explaining he slowed down due to fog and was hit from behind by a bus. Investigators are considering two scenarios: either he slowed for a broken vehicle ahead or due to dense fog, leading to the bus driver’s inability to avoid the crash. The truck's tachograph will provide crucial evidence regarding speed and braking. The driver assisted the injured after the accident, contradicting earlier claims. The tragedy's death toll has risen to 12, with ongoing investigations involving over 100 witnesses and 50 forensic examinations.

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