The New Paper NSF Dave Lee died of heatstroke, no foul play involved: Coroner CFC Dave Lee Han Xuan died 12 days after being admitted to hospital for heatstroke. A 40-minute delay in evacuating him to a medical centre was a contributing factor in his death. TNP FILE PHOTO Inquiry's findings show 19-year-old had no medical history which predisposed him to heatstroke 0 Engagements The State Coroner has found that full-time national serviceman (NSF) Dave Lee Han Xuan, 19, died of heatstroke in 2018 and that there was no basis to suspect foul play in the case. Giving her findings yesterday following an inquiry, State Coroner Kamala Ponnampalam also said he had no medical history which predisposed him to heatstroke.