The family of a British man whose wife and baby were found murdered in the United States have refused to comment on claims that he has refused to meet detectives probing the killings.
Neil Entwistle is reported to have chosen not to talk with investigators from Massachusetts after receiving legal advice ahead of a meeting at the American Embassy in London on Friday.
Nottinghamshire Police said Mr Entwistle had agreed to travel voluntarily to the capital from his parents' home in Worksop, Notts, to speak to four American detectives investigating the deaths.
But the Boston Globe reported that the 27-year-old had declined to meet the officers.
A source with direct knowledge of the investigation told the newspaper: "He is not cooperating with police on the advice of lawyers."
Mr Entwistle's parents both declined to comment to reporters and camera crews, including representatives from the American media, gathered outside the family home in Kilton, Worksop.
His wife Rachel, also 27, and nine-month-old daughter Lillian were discovered under a pile of blankets in a bedroom at their home last weekend. Both had been shot.
Having met at university in York, Rachel taught at a school in Redditch, Worcestershire, before they moved to the US.
Mr Entwistle is thought to have left the US before the bodies were discovered lying side by side. Forensic evidence showed Mrs Entwistle and her daughter died at some point between Friday morning and Saturday night last weekend.
Mr Entwistle is believed to have boarded a flight from Boston to London late on Friday or early on Saturday.
Meanwhile internet auction company eBay said it was helping authorities investigating Mr Entwistle's online activity. He is reported to have run a website offering get-rich-quick pyramid schemes linked to internet pornography.