We're trying to determine exactly what happened, how it happened and when it happened.

Any time you blow things up and set things on fire and potentially put people?s lives in danger, it will be considered a crime.

Looking for other cases is a normal part of the process.

Looking for other cases is a normal part of the process. Given the on-going nature of the overall investigation, it is possible other victims will be identified.

There is definitely the potential that they?re serial robbers. Anytime you have multiple robberies in multiple states, that?s a possibility.

We do believe he's crossed state lines -- most likely into California. Beyond that we're not being very specific so as not to tip him off.