It is a work of art created by sculptor Hedva Ser, who is a UNESCO Goodwill Ambassador, the organisation says
On Oct 16, 2008, 15-year-old Mohiuddin went missing after leaving home following a call on his mobile phone.
His body, with injuries inflicted by sharp weapons, was found the next day at a lake.
On Wednesday, the Additional District and Sessions Judge's court convicted five people for the killing.
They are Shamim, Nurul Islam, Saddam Hossain, Shafiqul and Babu.
Hossain and Babu were on the docks when the court announced its decision while the others are absconding.