Abuubaida Kadir, 46, football and swiming coach of the teenaged boy, admitted his involvement in the drowning death incident of 17-year-old Zubair Ahmed in city’s Uttara area on October 4.
During police interrogation, he said he left Zubir in the pond as he did not listen to him.
But the detailed motive for the killing has not yet been made clear.
The sole eyewitness to the murder, in a Section 164 statement before the court, said Zubair was molested and killed by Kadir in the pond after they finished a football match at a football ground near the pond.
In the confessional statement, the witness said he saw the whole incident but did not disclose it as Kadir had told him to keep his mouth shut.
In an earlier statement to police, the eyewitness also claimed that Kadir offered to help him go abroad if he kept quiet about the killing.
Police said actually the post mortem report will bring the matter into light where the boy was raped or attempted rape.
The report will also clarify the time death.
SM Nazmul Islam, senior assistant commissioner of Detective Branch of police, said investigators are trying to collect more evidence and information about Kadir’s involvement in the murder as well as investigating his illegal stay in Bangladesh.
The documents, we found showed that Kadir is an Algerian citizen who came to Bangladesh in 1998 to get a degree in Information Technology from Darul Ihsan University,” Nazmul said.
Kadir’s student visa expired in 2001 but he never went back to Algeria. Instead, he destroyed his passport and other documents and lived in Bangladesh illegally.
Zubair Ahmed, an O’ level student, was drowned to death in capital’s Uattara area on October 4.
On October 5, members of police recovered his body from a pond at Uttara sector 4.