District Attorney Hillar Moore said he may seek the death penalty.
White man arrested in slayings of 2 black men in Louisiana →
"It appears to be cold, calculated, planned (against) people who were unarmed and defenseless," he said. "We don't need to prove motive. There are a lot of things that are unanswered."
Kenneth Gleason, white man accused of killing 2 blacks, had Hitler speech →