A man accused of murdering his wife and baby used a website days before their deaths to email a woman saying he was looking for a discreet relationship and "a bit more fun in the bedroom", according to US court documents released yesterday.

Prosecutors also claimed Neil Entwistle told friends in the UK a version of events of his actions in the case that differed from the account he had given police.

Entwistle (27) allegedly told friends that before leaving for Britain after discovering the bodies of his wife Rachel and daughter Lillian Rose, he had told his mother-in-law and had gathered with family in Carver where they lived to mourn the news.

Then he said he began to feel left out and decided to return to his own family in England, going straight home after arriving in London on the evening of January 21.

But, the statement of the case said, further evidence showed he rented a car, spent a night at a hotel about an hour past his home, and drove almost 800 miles around England before going to Worksop, Nottinghamshire, on January 23.

Entwistle is charged with two counts of murder and firearms charges in connection with the January 20 killings of his 27-year-old wife and daughter at the family home in Massachusetts. He has pleaded not guilty.

He has been held without bail since he was originally arraigned on February 16.

Yesterday's documents also said he told the police he went to Rachel's mother's office to tell her of the deaths but said he could not find the building.

He apparently then went to Boston's Logan International Airport and flew to the UK.

Entwistle allegedly searched the internet looking for escort services in the days before the killings.

The documents claimed he used a website called Adult Friends Finder to send a series of emails between himself and another person, apparently a woman.

In the messages "the defendant says he is in a current relationship but looking for a bit more fun in the bedroom and a very discreet relationship just for fun", the statement allege.

The document also alleged that Entwistle, who did not return to the US for the funeral of his wife and baby, faxed a letter to the Medical Examiner's office in Boston relinquishing all responsibility for burial arrangements to his wife's parents.

Prosecutors allege that Entwistle shot his wife, who had taught at a school in Redditch, Worcestershire, and daughter in their rented home in suburban Boston after racking up tens of thousands of dollars in debts and becoming dissatisfied with his sex life.

He allegedly used his father-in-law's .22-calibre handgun to kill his wife and daughter, then drove 50 miles to their home to return the weapon.

Besides the murder charges, Entwistle is charged with illegal possession of a firearm and illegal possession of ammunition.

If convicted, he faces a mandatory life sentence. Massachusetts does not have a death penalty.

Entwistle was ordered to be held without bail and a status hearing was set for May 23.