Authorities issued an arrest warrant for Peterson late Thursday, a day before investigators had positively identified the badly decomposed remains. Modesto police, the California Highway Patrol and federal agents had been watching the husband for months, using wiretaps, vehicle tracking devices and direct surveillance. They said Friday that they feared Peterson might flee, perhaps to Mexico.
"We started to worry," California Atty. Gen. Bill Lockyer said in an interview on CNN's Larry King Live.
"He was aware of surveillance teams, was waving at them and being, you know, kind of a smart aleck, and so they finally decided that they ought to just pull him in."