Neil Entwistle's activity on his laptop computer the day his wife and infant daughter were killed is expected to be the focus of his murder trial when testimony resumes Thursday.

On Wednesday a police detective testified that Entwistle researched suicide on his computer three days before the killings.

Medford Detective Lawrence James, a forensic computer specialist, testified Wednesday that Entwistle's laptop was used to do a Google search for "quick suicide method" on Jan. 17, 2006. The same day, the laptop was used to do a search using the keywords "knife in neck kill," James said.

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Prosecutors are expected to ask James on Thursday what activity there was on Entwistle's computer the actual day of the killings.

Judge Diane Kottmyer ended testimony for the day on Wednesday just as James was asked to describe what his laptop showed the day of the murders, after the time authorities believe his wife and daughter were shot.

Entwistle, 29, of Britain, is accused of killing his 27-year-old American wife Rachel and their 9-month-old daughter Lillian Rose on Jan. 20, 2006, in their Hopkinton, Mass., home.

Earlier Wednesday, James testified that Entwistle's computer was used to visit Web pages for at least a half dozen escort services on Jan. 16 and 18. Driving maps to local escort services also were downloaded, James said.

Prosecutors allege that Entwistle committed the murders after sinking deeply into debt and becoming dissatisfied with his sex life.

Entwistle denies killing them and told state police he returned home from shopping and found them dead in a bed in their master bedroom.