O'Toole on Fox 25 Boston addressing Marcotte murder case

"If there is no relationship with the victim, if this is somebody that was walking along or more likely driving along and decided to do this.That's a unique kind of violence. It’s cold blooded, its predatory, and its without empathy, and it is purposeful. And that's the kind of violence you seen when a stranger goes after someone that they don’t know," she said.

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Fox quotes O'Toole on Princeton jogger murder case

A former FBI profiler told FOX25 that the wait for answers from investigators is not unusual.

"What they are trying to do, particularly at this stage, is not give away information that the suspect can get ahold of," said Mary Ellen O'Toole.

O'Toole said whether the suspect was a stranger to Marcotte - or stalked her, and knew her well - it's certain that in the past 30 days he's felt an enormous amount of stress. He's worrying that his hastily made crime scene so close to the edge of the road - left many clues, as reported on FOX25 News at 6.

"He made a mistake here by committing an outdoor crime scene...you still can't be sure who might have seen you and be able to recognize you," she said.

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