A 40-year-old Ringwood woman has died in police custody at Knox Police station.
Police said the woman was found unresponsive during a routine check by custody officers just before 8pm on 2 December.
The woman was awaiting a remand hearing after being taken into custody.
Police said officers commenced CPR and paramedics were immediately called.
The woman was transported to hospital and later passed away.
Detectives from the Homicide Squad will investigate the death, with oversight from Professional Standards Command, which is standard protocol when a person has died in police custody.