In addition to photos and video, those investigating Monday's bombing of the Boston Marathon are evaluating social media as well.
According to Fox News, an investigative source said analysis of Twitter and Facebook posts 24 hours before and the 24 hours after the race -- composing more than 30,000 messages within a mile radius from the finish line -- have created a "significant social media footprint."
The source told Fox link analysis charts were created from the information, showing "the relationships between social media messages that met investigative criteria."
They are specifically looking into messages that are "out of place or coded."
In the past, social media, like Facebook, has been used countless times by law enforcement to catch thieves and other criminals. Those working on the Boston bombing case, which killed three and injured more than 170 near the race's finish line Monday afternoon, are hoping to find leads there as well.
The FBI was also turning to social media this week asking that anyone with information contact its hotlines. Facebook, Twitter and safe lists were also used the day of the explosions to help locate friends and family members on the scene while cellphones were jammed.
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