BOSTON, Massachusetts (CNN) -- They were crimes born of the Internet age -- romantic solicitations on popular Web site Craigslist that police say led to the fatal shooting of one woman and the robbery of another in Boston hotels this past spring. Internet forensic expert Mark Rasch used high-tech sleuthing to help police in Boston's Craigslist crimes. And it was high-tech, 21st-century sleuthing, along with some old-fashioned gumshoe detective work, that put police on the trail toward a suspect and eventually an arrest. On CNN's "AC 360"  Randi Kaye recently took a behind-the-scenes look at how technology was used to lead police to 23-year-old medical student Philip Markoff, who has been indicted on seven counts, including first-degree murder.
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Internet expert: Craigslist slaying suspect left a trail of clues behind in cyberspace
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Mark Rasch says he used a tracer program on e-mail sent to slaying victim
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Boston investigators even used a Google search to help track down suspect
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Philip Markoff, a medical student, pleaded not guilty in death of Julissa Brisman
Even though police had what they believed was the killer's real name and home address, that still was not enough, @placeholder reports.