On a national Holiday IIM Question

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IIM question.. Answer if you can..
On a national holiday a lady , a school boy , a lawyer , a pilot and a doctor were travelling in a bus 🚍 which was climbing up on a hill.. Suddenly the bus was hijacked by one of the passengers.. With tension arose, the bus driver collides the bus with a car accidentally in a hairpin bend.. Everyone in the bus fell unconscious except school boy who was seriously injured. Everyone were hospitalised ..
When police made an enquiry at school boy about hijack, he said 3 words "i am dying" to police and died.. Next minute police arrested the hijacker.
How?
Find out the answer if you are brilliant tell ans with reason..