Greater Manchester Police have released an image of Souvik Pal, the missing Manchester Metropolitan University student, taken shortly before he left home on New Years' Eve.
Souvik's father, Santanu Pal, says he will stay in Britain until his son is found.
Further tests will be carried out into the death of missing student Souvik Pal. A post-mortem examination carried out was inconclusive.
The father of missing student Souvik Pal will appeal for information about his missing son, one week after his disappearance.