A local terrorism expert says good police work is proving to be the key in tracking down suspected terrorist. Jonathan White is a professor at Grand Valley State University.

While investigators do not suspect a terror cell is involved in the bombings on in New York and the Jersey shore, White says terrorists often make mistakes that end up getting them captured.

"Terrorist groups tend to form about eighteen months before they strike their target, they're usually formed, most of them are formed within 75 miles of the target, and in the three months prior to their intended attack. They tend to commit an average of four crimes. Those four crimes mean they have a good chance of running into the police and counter terrorism is just basically good policing," White said.

Investigators say the bombing suspect did not have any record of criminal misconduct.