SC Massacre Investigation: Friends Say Suspect Dylann Roof Wanted to Start a "Race War"

New chilling video from inside the SC church taken moments before deadly shooting.
2:48 | 06/19/15

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Transcript for SC Massacre Investigation: Friends Say Suspect Dylann Roof Wanted to Start a "Race War"
And we all heard the tears delivering that, but what about his reaction? And word the suspect's own father called police. Cecelia Vega also in south Carolina tonight. Reporter: Hollow eyes and no emotion. The face of an accused killer. This is the state versus dylann roof. Reporter: Two heavily armed guards at his side. Even as those families sobbed. Roof barely uttering more than a syllable. What is your age? 21. You're 21. Are you employed? No, sir. Reporter: A 21-year-old high school drop-out, now charged with nine counts of murder in one of the deadliest attacks on a house of worship in U.S. History. My mission is to bring justice for this community. And especially for the victims in this case. Reporter: And tonight, a new look at those final moments inside this historic Charleston church. That's roof, the only blonde at the table during that bible study, in a short snapchat clip taken by one of his victims before the shooting. Now, police search warrants say after the group spent an hour Reading and praying, roof stood up, pulled out a handgun and opened fire. Shooting each of his victims multiple times. Standing over one of them and uttering, investigators call a "Racially inflammatory statement." Police say among the people who contacted authorities when they saw his picture, his own father and uncle. Now, roof is in isolation here. Police say it's for his own protection. And the flags at this jail, flying at half staff to honor the very people he's accused of killing. Roof's family saying they can't express their shock and disbelief. His friends telling me it was a plan six months in the making, fueled by roof's unabashed racism. He said he thought the black in general as a race was bringing down the white race. Reporter: This photo on instagram tonight raising even more questions about those beliefs. Roof posing on his car with a confederate flag license plate. And as you can see behind me, Emanuel AMC is still a crime scene. They're not sure where they will worship, but will be back here very soon. And one more note on this tonight. An emotional debate over the confederate flag flying over the capital building in south Carolina. We've seen this image, the flag on the license plate. Tonight, president Obama doubling down on his position, saying this flag belongs in a mu seem. #Takeitdown trending today.

This transcript has been automatically generated and may not be 100% accurate.

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