Las Vegas Cop Killers Husband-Wife Team

A Las Vegas couple who shot to death two police officers, a civilian and themselves — after telling a neighbor they were headed to an "underground world" — had an anti-government, anti-police ideology with militia and white supremacist overtones, authorities said Monday.

The duo left calling cards of their world view on the bodies of the slain cops: a "Don't Tread on Me" flag, a note that read "The revolution is beginning" and a swastika meant to equate police with the Nazis, McMahill said.

The couple's ideology was no secret, yet a neighbor who saw them set off on foot Sunday morning with a red shopping cart carrying weapons and ammunition was not alarmed enough to call police.

"I thought they were talking out of their neck," Kelly Fielder told NBC Los Angeles.

She said Jerad Miller, 31, had two guns and bullets and Amanda, 22, had a .38 caliber handgun in her purse and a rifle.

"We gotta do what we gotta do," Jerad Miller told Fielder, adding that they were departing for an "underground world" and needed protection.

Amanda Miller then embraced Fielder and said, "I am so sorry."

Police believe the couple walked the four miles to CiCi's Pizza, where Officers Alyn Beck, 42, and Igor Soldo, 32, were having lunch in a booth.