Police hunting a man in connection with the murder of his estranged wife, whose body was found by their 12-year-old daughter, believe he may be in Birmingham.
The body of 36 year-old Samantha Renfrew was found in the house at Frimley, Surrey, on Wednesday.
She had been stabbed to death.
Police said Mrs Renfrew's daughter discovered her body.
Surrey Police said they wanted to speak to Mrs Renfrew's estranged husband David.
He is thought to be in the Birmingham area and officers from West Midlands Police have joined the search for him, a spokesman said.
It is understood that the couple had separated and police yesterday were also searching a separate address nearby where Mr Renfrew had been living.
The couple's daughter and ten-year-old son were being looked after by relatives.
Forensics experts were searching Mrs Renfrew's home and police said the knife used in the attack had been recovered.
Dr John Trigg, vice principal of Tomlinscote School, which Mrs Renfrew's daughter attends, said the news had come as a terrible shock.
He said Mrs Renfrew had chaired the parent teacher association and she had been there as recently as Tuesday for a school event.
Describing Mrs Renfrew's daughter as a "lovely girl", he said that psychologists were on hand to help children shocked and distressed by the murder, as well as pastoral support from teachers.
Surrey Police said post mortem tests were currently under way.