Jurors trying Englishman Neil Entwistle accused of the murders of his American wife and baby are to hear closing arguments.
Entwistle's defence team offered no witnesses after the prosecutors rested their case on Monday.
The 29-year-old former IT worker denies killing his 27-year-old wife Rachel and nine-month-old daughter Lillian Rose on January 20, 2006.
Judge Diane Kottmyer told the jury at the Middlesex County Superior Court that there would be a break for legal arguments before closing speeches would be heard.
Entwistle had a secret life in which he trawled the internet for escorts and looked at websites about bankruptcy, killing and suicide before shooting dead his family in the four-poster bed at their new home in Hopkinton, Massachusetts, the court has heard.
The jury panel of eight men and eight women was told that a post-mortem examination found Rachel was shot in the forehead at close range and Lillian was killed with a bullet which passed through her abdomen and lodged above her mother's left breast as she cradled her on the bed.
Entwistle, who told US authorities he found the bodies after returning from a shopping trip, faces life in prison without the possibility of parole if convicted of the double murder.
Earlier, the jury heard a recording of a phone call between Middlesex state trooper Robert Manning and Entwistle on January 26, after he travelled to England on a one-way ticket.
Entwistle simply responded "OK" when Mr Manning, the lead investigator in the case, told him the deaths were being treated as the result of "foul play".
He also said that when he saw the bodies there was "no question" that they were dead and asked whether the trooper thought his wife and baby had suffered.