A woman and a girl found dead in a house in Suffolk have been named by police as Jillu Nash, 44, and her daughter Louise Nash, 12.
Police were called tor the Heath Estate in Great Waldingfield on the morning of 8 September after safety concerns were raised.
They found Ms Nash and her daughter dead inside.
Post-mortems found that Ms Nash died as a result of pressure on her neck, while her daughter Louise died from a stab wound to the abdomen.
A 46-year-old man was found in the house with serious injuries.
He is still in hospital in a stable condition and is also under arrest on suspicion of two counts of murder.
Detectives are appealing for any witnesses or anybody with information to contact the Major Investigation Team via the online portal or by calling 101 quoting reference 57943/22.
People can also contact the independent Crimestoppers anonymously by calling 0800 555 111 or online.