Sharjeel Usmani, the son of Assistant Professor Tariq Usmani of the AMU's Department of Geography, was picked by the Uttar Pradesh's anti-terrorist squad (ATS) sleuths from his uncle's house in Azamgarh on Wednesday and was subsequently produced in a court in Aligarh which remanded him in judicial custody, they said.
The girl was shifted to Delhi's Safdarjung hospital after her condition deteriorated and she died on Monday.
After covering several kilometres on foot along with their families, the labourers, who reached Charbagh bus station in Lucknow on Saturday and Sunday, said there was no point staying in Delhi as they have exhausted their funds and it would be better for them to return to their homes.