More information is coming to light about the pair behind Sunday's Las Vegas shootings

New details are emerging about Jerad and Amanda Miller, the couple who shot and killed two police officers and an armed bystander in Las Vegas on Sunday.

On Sunday morning, they left their friend's apartment in downtown Las Vegas at around 4:30 a.m., the Las Vegas Review-Journal reports. Their bags contained 200 rounds of ammunition, knives, camouflage clothing, and military-issued rations. Police say that they told neighbors they were set on murdering cops. One neighbor, Kelley Fielder, told the Review Journal that the Millers were her "best friends," and she didn't know they were "that crazy." She had a box filled with documents written by the pair, which detailed plans to take over a courthouse and kill public officials.

An official also announced on Monday that in April, the Millers went to Cliven Bundy's Nevada ranch, looking to join the armed supporters that had descended on the property. Jerad, 31, shared on Facebook that he wanted to protect Bundy "and his family from Federal Government slaughter." But, on his Google+ account, Jerad wrote that he was not welcomed because he was a felon; he spent time in and out of jail beginning in 2000, and was convicted of drug dealing and possession charges related to marijuana in 2007 and 2010. Jerad also posted that he and Amanda, 22, quit their jobs and "sold everything" in order to go to the ranch.

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The Millers' postings on Facebook are being looked at closely by authorities, and officials say that Jerad's anger at the government was on full display. In May, he wrote: "There is no greater cause to die for than liberty. To die for that cause is easy, to live for it another matter. I will willingly die for liberty." He made his last post at 4 a.m. Saturday, saying: "The dawn of a new day. May all of our coming sacrifice be worth it."