A computer engineer charged with murdering his wife and baby daughter searched for and researched ways to kill them online, testimony in a Massachusetts court this week revealed.

Neil Entwistle, 29, used his Toshiba laptop and Google to research various methods including "how to kill with a knife," according to a computer specialist who testified this week. Entwistle is charged with shooting his wife Rachel, 27, and 9-month-old baby in January of 2006.

"This is Internet history I retrieved from the laptop," testified Lawrence James, a computer expert from the Northeastern Massachusetts Law Enforcement Council. James took the stand in Entwistle's jury trial. After examining Entwistle's laptop, he found several searches that embarrassed the defendant.

Entwistle's computer also was replete with searches for "hot escorts" and "naughty nightlife" sites, including some sites that promoted sex-swinging, according to media reports.

Testimony was delivered charging Entwistle with searching for ways to kill just days before his wife and child were murdered. One site, James said, displayed anatomical diagrams of major body arteries. The Web site, James said, noted that "it's best to stab through a human rib cage."

The testimony, in Middlesex Superior Court, also revealed that Entwistle, a native of the U.K., surfed the Internet for flights on British Airways. After his wife and daughter were murdered, Entwistle flew to the U.K. where he was apprehended and eventually returned to Massachusetts to stand trial.

Judge Diane Kottmyer, who is presiding over the case, permitted the testimony and evidence on Entwistle's searches to be presented to the jury.