The FBI has concluded there's no evidence the Manhattan, Kansas man who ingested a chemical following a minor traffic accident in Omaha Monday planned to use it against the public or that he has any terrorist ties.

The FBI also said the chemical eaten by Sivaprakash Natarjan was not explosive or dangerous to the public. He will not face any federal charges. The FBI isn't sure why Natarjan was in Omaha, since it appears he has no ties to the community.

Natarajan remains hospitalized in stable condition. For reasons still unknown, he swallowed the cyanuric chloride after the accident at 40th and Leavenworth. It caused a lot of concern as a police officer, firefighter, and the other driver involved all had to be decontaminated. The situation forced emergency crews to see how well prepared they are.

The early assumption from both the other driver and the police officer at the scene was that Natarajan was high on drugs. Why else would he offer the woman, who wants to remain anonymous, $2,000 to keep the fender bender quiet? "He came over to me and said 'please don't call the cops, please don't call the cops.' I said they're already coming." That's when Natarajan ingested the white powder, according to the other driver. His car was later sealed by firefighters. The powder, cyanuric chloride, made Natarajan violently ill.

Police allowed the other driver to leave the scene, but she was later called back for decontamination. Everything turned out okay for those exposed to the chemical, but letting her go was one of the few mistakes in an otherwise smooth operation, according to Omaha Fire Department Special Operations Battalion Chief Mark Lane. "That's why they call them blue canaries, because many times when you're the first one on scene, you're confronted with the unexpected. You go to a car accident and nobody expects someone to pull out an unknown chemical and start consuming it and then start acting irrationally."

Lane called it a real-life incident that showed the training is working even if there are some things emergency crews can learn from this. "I actually went to sleep feeling good about it, so that alone says something."

Cyanuric chloride is an acid used in the manufacture of pesticides and herbicides. While it does not contain cyanide, it can cause burns to the skin and internal burns if ingested. Natarajan told police he got the substance from Kansas State University. The school says it has no reports of stolen or missing chemicals. Natarajan was a K-State student in its master's degree program for apparel and textiles from 2001 to May 2004, but is not currently enrolled there.