A man that was found dead by Mill Hill School in Ripley has been named as Glen Duncan.
Mr Duncan was last believed to have lived in Langley Mill.
Four people, two men, aged 32 and 29, and two women, aged 32 and 24, have been arrested and bailed on suspicion of drugs offences in relation to the death of Mr Duncan, aged 30.
Emergency services were called at around 12.45pm on Tuesday, April 16, to a pathway which runs from Mill Hill School to Peasehill Road.
Two men, aged 30 and 43-years-old, were found to be unwell by paramedics and were taken to Kingsmill Hospital.
The 30-year-old man was pronounced dead on arrival at hospital. His death is not being treated as suspicious at this time.
The 43-year-old was later released from hospital.
Anyone with information about the incident is asked to call Amber Valley CID on 101 or Crimestoppers anonymously.