Following the dual explosions at the Boston Marathon that claimed three lives and injured over 100, a Saudi national is in custody ... but is he a real suspect?
Officials say the person in custody is not charged and not under arrest. He is cooperative, answering all their questions, and denying involvement.
CBS News' John Miller, a former assistant FBI director, said a witness reported that a person was acting suspiciously when the explosions happened.
That person, believed to be a 20-year-old Saudi national, was then taken into custody, but Boston Police deny he is a suspect. CBS News explains:
"They see him running away from the device," said Miller. "Now, a reasonable person would be running away. But this person had noticed him before."
"This is a civilian - chases him down, tackles him, turns him over to the Boston police. The individual is being looked at [and] was suffering from a burn injury."
"That means this person was pretty close to wherever this blast went off, but not so close as to suffer the serious injuries that the other people did."
Police will examine this person's communications and every aspect of his life, as well as talk to the witness who tackled him to find out what was so suspicious.
"So if that individual pans out that," said Miller, "that of course, it would give the case a big jump forward. If not, then they're back to physical evidence."
"Forensics, witnesses, whatever they can pick up on surveillance cameras."
As for what authorities will be looking for in the crime scene area, Miller said they will look for what they can pick up on those two devices that detonated.
"Were they command detonated, meaning was somebody standing in between them with a remote control? Were they controlled by a cell phone?"
"Or were they carefully timed? That would be a challenge to have them timed to go off so close together and to place them in those places without being detected."
President Obama said in a statement last night that the perpetrators will be brought to justice, but stopped short of using the word "terror" at any point.