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Entwistle computer gives up secrets

Documents: Suspect researched killing methods, sought escorts

Gallery: Murder timeline

• Entwistle agrees to return

• Police question husband

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BOSTON, Massachusetts (CNN) -- Just days before the slayings of his wife and infant daughter, Neil Entwistle looked at a Web site that described "how to kill people" and searched for escort services, according to search warrant documents released Monday.

Entwistle, a 27-year-old from Britain, is accused of shooting his wife, Rachel, 27, and their 9-month-old daughter, Lillian, on the morning of January 20, possibly because of financial problems.

Entwistle had not worked since last September, and the family was paying $2,700 a month for their Hopkinton, Massachusetts, home, the documents say. (Watch what prosecutors said about the family's finances -- 3:37)

"I believe that there may be a financial motivation for this murder," Massachusetts State Police trooper Michael Banks wrote in an affidavit.

The documents reveal that Entwistle apparently kept the family's finances hidden from his wife and that her parents once believed he worked "some type of secret government job in England which he could not talk about."

Details in computer

But, according to the documents, the most troubling details were found on his computer. The information concerned activity on his computer the day before his wife and infant daughter died of single gunshot wounds:

On January 16, just four days before the slayings, Entwistle visited Adult Friend Finder, a Web site that is dedicated to "assisting subscribers in finding sexual partners through Internet chat rooms, personal advertisements and other services, and that Entwistle made attempts to contact persons on that site."

On that day and the next, Entwistle looked at an electronic document that "describes such things as how to kill people by various methods; and that Neil Entwistle actually typed in Internet searches regarding how to kill yourself, suicide, how to kill someone with a knife, and euthanasia."

On January 18, Entwistle looked for escort services over the Internet and took down the names of several in the Boston and Worcester areas, including "Eye Candy Entertainment," "Exotic Express" and "Sweet Temptations." That same day he searched for maps to locate specific streets in the Worcester area.

The bodies of Entwistle's wife and daughter were found January 22, in the family home under a pile of bedcovers and pillows. They were so well-hidden, police initially didn't find them, the documents say.

By then, Entwistle had taken a flight to his native England.

Father-in-law's gun

Middlesex District Attorney Martha Coakley says Entwistle allegedly killed his family with a .22-caliber handgun he took from the home of his father-in-law, Joseph Matterazzo, then secretly returned.

Police found keys to Entwistle's in-laws' home inside his locked car at Logan Airport, Hopkinton police Sgt. Joseph Bennett wrote in an affidavit released Friday.

Matterazzo said he last used his .22-caliber revolver and rifle when he went target shooting on January 21, a day after Rachel and Lillian were believed to have been killed, according to the search warrant documents.

Matterazzo said he had taken Entwistle target shooting with his .22-caliber weapons in the past and his son-in-law knew where he kept his weapons locked, with the keys on the counter, according to the search warrant documents released Monday.

A forensic exam of the .22-caliber handgun revealed Entwistle's DNA on the grip of the firearm and DNA matching Rachel Entwistle on the muzzle.

Inconsistencies in story

The documents also say police found inconsistencies in a phone interview Entwistle gave to Massachusetts state trooper Robert Manning in which Entwistle said he ran errands for about two hours the morning of January 20, came home and found his wife and daughter in the master bedroom, wrapped in covers.

"Neil said that he pulled down the comforter, saw his wife was pale, saw blood on the baby and that the baby had been shot and they were dead," according to the affidavit.

Banks, the state trooper who wrote the affidavit, said that was not consistent with what authorities found.

"Entwistle stated that he went up to the bedroom, saw blood on his daughter, and saw that both his wife and daughter had been shot," Banks wrote. "When investigators found the victims, however, the baby's face was covered with a pillow, and there was no immediate, visible evidence that either Rachel Entwistle or baby Lillian had been shot."

In addition, a receipt found in Entwistle's car at Logan Airport showed that the BMW entered the garage on January 19 at 10:49 p.m., according to the affidavit.

Entwistle was arrested in London last Thursday and charged with two counts of murder, one count of illegal possession of a firearm and one count of illegal possession of ammunition. Entwistle chose not to fight extradition, but he has yet to be transferred back to the United States. (Watch for details about the arrest and extradition preparations -- 4:07)

If convicted, he could face life in prison without parole. Massachusetts does not have the death penalty.

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