From ynetnews.com with contribution from Reuters:
The couple who shot
two Las Vegas police officers to death in a weekend ambush before
killing a bystander and themselves in a nearby Wal-Mart harbored
anti-law enforcement and anti-government ideologies but are believed to
have acted alone, authorities said on Monday.
Police are still investigating their links to white supremacy
movement after swastika symbols were found in the couple's apartment,
the Las Vegas Review Journal reported.