PHOENIX – The tagline on Shawna Forde’s anti-illegal immigration Web site says her group was “doing the job our government won’t do.” They wanted to patrol the border, but her small band of activists needed money to do it.

So, authorities say, Forde and two men dressed up as Border Patrol agents and broke into the southern Arizona home of a man they thought was a drug dealer, hunting for money or drugs to sell. They found neither, but killed the man and his 9-year-old daughter.