A man arrested on suspicion of the murder of his wife is in a critical condition in hospital, as police refer the case to the Independent Police Complaints Commission (IPCC).
Police were called at about 3.25pm on Thursday to reports of a disturbance at a flat in Duppas Hill, Croydon.
On arrival officers forced entry and found Rebecca Sessacar, 25, with critical injuries.
She was pronounced dead at the scene.
A 28-year-old man, understood to be Mrs Sessacar's husband, Bulent Sessacar, was also found injured at the address.
He was arrested at the scene on suspicion of murder but was taken to a south London hospital.
Due to police having prior contact with him, the matter has been automatically referred to the IPCC.
Police first said he was not though to be in a life-threatening condition. They have now said he is in a critical condition.
Police are not looking for anyone else in connection with the murder inquiry.
The couple's six-year-old daughter, who was at the flat at the time, has been taken into foster care by Croydon Council Children’s Services.
A post-mortem examination to establish cause of death is being held at Croydon mortuary today.
The murder investigation is being lead by Detective Chief Inspector Russell Taylor from the Homicide and Serious Crime Command.
Anyone with information is urged to contact the incident room on 020 8721 4868 or Crimestoppers anonymously on 0800 555 111.