The incident occurred in Sarojini Nagar police circle in the afternoon, when Akhilesh Mishra, a teacher at Red Rose Public Secondary School, was returning home in Ashiana.

Police said the boy seemed depressed for the past one week, ever since the school decided to withhold his admit card for the board exams that are beginning on March 2.

According to Sarojini Nagar police station in-charge Abhishek Singh Sirohi, teachers said the boy, who has been visiting the school for the past few days for his admit card, hardly spoke to anyone of late.

On Saturday, the school finally relented and agreed to issue the admit card. In the morning, the boy went to the school in casual dress.

The class teacher rebuked him and asked him to come back in school uniform. The boy left, went home, picked up his father’s licensed revolver, and waited for the teacher a little away from the school gate. “Around 3.30 pm, when Mishra was going home on his scooter, the boy requested him for a lift,” said ASP (East) Harish Kumar. Near Vaishnav Bakery at Vishnu Lok Colony, the boy allegedly asked Akhilesh to stop, fired at him and ran away.

While the boy’s father, Prabhakar Trivedi, a head clerk with the divisional railway manager, was unavailable for comment, his mother is said to have told the police that her son was beaten up by his father when the latter got to know of his absence at the school at a parent-teacher meeting a few days back.