Days before his wife and baby daughter were found shot to death in bed, the man charged with killing them searched the Internet for ways to kill people and methods of committing suicide, according to search warrant documents.
He alsofor local escort services and Web sites that offer help finding sexual partners, authorities said in the documents released Monday by a judge.
Neil Entwistle, 27, was arrested in his native England last week. He was charged in the Jan. 20 slayings of his wife, Rachel, 27, and their 9-month-old daughter, Lillian, at their home in suburban Boston. They were found shot to death in bed.
There appeared to be trauma to the infant's face, including a contusion, and bruises to the left eye, nose and mouth area, CBS News' The Early Show co-anchor Rene Syler reports.
"People are speculating that this means, possibly, Rachel was holding the baby in her arms, that the baby was shot first, and perhaps Rachel dropped her on the ground," CBS News legal analyst Wendy Murphy tells Syler.
The documents also depict Entwistle as a secretive man who was sinking deep into debt without telling his family, CBS News correspondent Elizabeth Palmer reports. He had not worked since he and his wife moved to her native Massachusetts from England with their daughter about five months before the murders. His wife, who had been a teacher, also was not working.
Prosecutors said in an arrest warrant affidavit last week they believe Entwistle killed his wife and daughter because he was despondent after accumulating tens of thousands of dollars in debt, and that he had expressed "a dissatisfaction with his sex life."
"I don't think this is one of those sort of rage killings that happened on the spur of the moment," Murphy tells The Early Show. "(And) there's a lot of evidence of premeditation in case, getting the weapon, the cover-up, the fact that he was returning the gun to the place he took it, from Rachel's stepfather."
Prosecutors also said Entwistle may have planned to commit suicide, but instead fled to his parents' home in England.
Entwistle did not fight extradition, and U.S. marshals are scheduled to bring him back to Massachusetts this week; his travel arrangements are unknown. A spokesman for the office said Tuesday he had no information on the date or time.
"He believes that he will receive a fair and proper hearing in the United States on these very serious allegations," Judith Seddon, Entwistle's lawyer, tells CBS News.
The more than 200 pages of documents released Monday, over the objection of Middlesex District Attorney Martha Coakley, add more details from affidavits filed to support search warrants for Entwistle's home, car and computers. Framingham District Court Judge Robert Greco granted a request from media organizations to make the documents public.
Investigators said a search of Entwistle's computer revealed Internet searches seeking information about suicide, euthanasia and "killing people with a knife," on Jan. 16-17.
The same week, authorities said, he obtained the names and addresses of various escort services in the Boston area, including "Eye Candy Entertainment," "Sweet Temptations" and "Exotic Express." He visited a Web site called "Adult Friend Finder," which investigators said helps subscribers find sexual partners through Internet chat rooms, personal ads and other services.
In one document, State Trooper Michael Banks said the couple had recently paid $8,100 for three months rent on their Hopkinton home. They charged more than $6,000 to buy furniture and mattresses in the week before the killings.
"It appears that Neil and Rachel Entwistle had accumulated a sizable amount of debt and may have been living well beyond their means," Banks said in his affidavit.
Investigators also say Rachel told her mother, Priscilla Matterazzo, that her husband had made a lot of money while they were living in England, where Neil said he did military research for a firm called Kinetic.
Rachel told her mother their money "apparently had been tied up in offshore accounts which Neil would not talk about," according to the filings.
Investigators also described a telephone conversation between State Trooper Robert Manning and Entwistle on Jan. 23, three days after the killings, while Entwistle was at his parents' home in Worksop, England.
Entwistle allegedly told Manning that he woke up around 7 a.m. on Jan. 20, fed his daughter, then left the house to do some errands.
When he returned around 11 a.m., he said, he checked the baby's room. When he did not see Lillian, he went to the master bedroom, where he found his wife partially covered with the comforter.
"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," Manning recounted in the affidavit.
"Neil said he pulled the covers back over his wife and daughter, went downstairs, grabbed (a) knife from the kitchen and considered killing himself, but then put it down because it would hurt too much, and then decided to drive to Carver and tell his in-laws what had happened."
Entwistle told Manning he went to his in-laws' house in Carver, a town about 50 miles from his home, to get one of his father-in-law's guns to kill himself, but found no one home when he got there.
Authorities allege Entwistle used a .22-caliber handgun owned by his father-in-law, Joseph Matterazzo, to kill his wife and daughter, then drove to Carver, where he returned the gun while no one was home. Investigators said they found keys to his in-laws' home locked inside Entwistle's BMW when it was discovered at Boston's Logan Airport.
Entwistle told Manning he left Carver and drove to the airport, walked around a bit, then left to start driving back to his house. He then turned around and went back to the airport, where he boarded a flight for England, according to the affidavit.
Prosecutors said Monday that Entwistle has not told them he has an attorney in the United States.