Dhaka, Sept. 19 -- A phone call, a meeting at a university gate and a trail captured on CCTV are helping investigators piece together Ishayat Shahriar Apratim's final hours.

Comilla University Vice-Chancellor MM Shariful Karim said a man identified only as Tuhin had called the 13-year old Apratim on his mobile phone and lured him out.

Teachers began reviewing CCTV footage around the university after Apratim, the son of Bangla teacher Nahida Begum, had gone missing.

While examining footage on Saturday, they spotted him at the university gate around 3:30pm on Friday with an older boy wearing a cap, whose movements appeared suspicious.

"We identified him as Tuhin after informing police and speaking to locals. An assistant proctor-led tea...