 One of the big concerns now, say law enforcement, is the beginning of a vicious cycle, or at least coming as part of a vicious cycle. Not the beginning, but we've already seen an overheated climate of attacks, and we have the conspiracy theories as well that they're talking about. Now, this morning, the FBI says it's early in the investigation, and they've turned up no ties to international terrorism, but they say they'll continue to look to see if the dead suspect's connected to domestic extremists. You're listening to ABC News.