Singapore police have a further eight weeks to complete their investigation into a Belgian financial executive charged with murdering his five-year-old son, after state prosecutors Wednesday requested more time. Philippe Graffart, 42, has been charged with murder -- an offence punishable in Singapore by hanging -- for the death of his son, Keryan, at an upmarket condominium in October. Graffart's lawyer, Ramesh Tiwary, had no objections to the state prosecutors' request during a pre-trial appearance at a district court.