A spokeswoman for Nottinghamshire Police, said: "Police will be speaking to former residents and their families and will work closely with partner agencies to establish if any criminal offences have taken place."
"A police investigation has been launched after concerns were raised about the standard of care provided to residents at Autumn Grange."
Nearly 30 residents were moved out of a Nottingham care home today after "serious concerns" about the standard of care provided.
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The Health and Safety is "making enquiries" into the partial collapse of a multi storey car park in Nottingha.
The man threatened till staff with a knife before running off.
She was last seen in the city centre on the morning of Friday (August 18).