ABC News Exclusive: Entwistle Posts Lewd Photo Online

July 18, 2008— -- A pornographic photograph posted online by convicted wife and baby-killer Neil Entwistle was kept under wraps -- until now. The 30-year-old computer engineer from Worksop, England who was given two life sentences last month for murdering his American wife Rachel and 9-month-old daughter Lillian managed to persuade a Boston judge that this picture was irrelevant to the case against him. Prosecutors, however, said it showed that his outward appearance was a sham and he was living a secret life of lies and sexual deviance. The photo was never shown in court.

Entwistle posted what appeared to be a self-portrait taken in the garden of his parents-in-law house. The picture, obtained exclusively by ABC News, was posted on a Web site used for soliciting sex called AdultFriendFinder.com and shows Entwistle aroused in a lounge chair. Attached to the picture was a caption written by Entwistle which said, "I am looking for one on one discrete (sic) relationships with American ladies."

His wife had no idea that he was obsessed with Internet sex and she could not access their home computer because of special passwords.

Entwistle, who met Rachel at York University where she had won a 12-month scholarship, persuaded his wife that they should move to America. He blamed his northern England accent and the fact that his dad was a coal miner for his faltering career.

Within a few months, in January 2006, he'd killed both his wife and their baby daughter in an execution-style shooting.

Entwistle was given two life sentences and is spending 23 hours a day in an isolated prison cell just outside of Boston. Entwistle's parents claim that it was his wife, Rachel, who killed her own baby and then committed suicide. But evidence in court showed that Entwistle's DNA was on the gun's grip and his wife Rachel's DNA was in the muzzle.

What caused a young, apparently happily married British man to shoot his 27-year-old American wife and their daughter at point-blank range and leave them for dead on a blood-soaked bed as he fled to England?

People on both sides of the Atlantic have been pondering that question for two years now, ever since the stunning arrest of Entwistle in February 2006.

Police had been on Entwistle's trail ever since the bodies of Rachel and Lillian Entwistle were found Jan. 22, 2006, with their arms intertwined in the master bedroom of their spacious colonial home on a quiet cul-de-sac in Hopkinton, Mass.

The court sentenced Entwistle Thursday to two concurrent life terms for what Judge Diane Kottmyer called crimes "that defy comprehension."

Kottmyer went on to castigate Entwistle for his actions "because they involve the planned and deliberate murders of the defendant's wife and 9-month-old child in violation of bonds that we recognize as central to our identity as human beings -- those of husband and wife, and parent and child."

Since his arrest, Entwistle has maintained a sphinxlike demeanor -- for the most part remaining expressionless through his arraignment, incarceration and conviction.

So it was fascinating for members of the media to get a glimpse into the mind of a killer as evidence from the trial was put on display in Courtroom 430.

That prosecution's evidence included a spiral notebook seized from Entwistle when he was arrested in February 2006. In the pages of the book, there is a draft letter in which Entwistle pretends to be a "close friend" and pitches a proposal to sell his story to the highest bidder.

"What's of interest to us is what price you would be willing to pay for the exclusive rights to the full story. … We are leaving it open to the highest bidder," wrote Entwistle. And, he added, there would be enough material to last "a week."

The prosecution has long argued that Entwistle killed his wife and child because this suburban dad was dissatisfied with his sex life and swimming in debt. In closing arguments, assistant district attorney Michael Fabbri said that Entwistle had "reached a tipping point."