IPCC witness appeal over Douglas Ferguson's death
The police watchdog is appealing for witnesses to help with its investigation into the death of a Hampshire medical student.
Police were called to Heathfield Road, Chandler's Ford, on 27 June, after Douglas Ferguson, 19, became unwell.
The student was taken to hospital in Winchester but died later that day.
The Independent Police Complaints Commission (IPCC) is investigating because Mr Ferguson had been "in contact" with police before he died.
Investigators want to hear from anyone who was near Heathfield Road or Nichol Road when he was taken ill between 06:30 and 07:30 BST.
They are looking at the circumstances surrounding "police involvement with the deceased, including restraint techniques used, from the point officers arrived at the address".
Commissioner Mike Franklin said: "Our investigation is at an early stage and we need to speak with anyone who was in the area at the time officers attended the address and assisted ambulance staff with the man.
"We have a family liaison manager working with the man's family and our role and how the investigation will proceed has been explained to them.
"In order to assist us in obtaining answers for this young man's family I urge anyone who was in the area around the time of the incident to come forward."
Hampshire Police have arrested a 19-year-old man and a 17-year-old boy on suspicion of supplying controlled drugs.
They have been released on bail until 5 September.
Mr Ferguson was studying medicine at University of Bristol.
A post-mortem examination was inconclusive and further tests are being carried out.