Three brothers are charged with committing the Nov. 28 armed robbery of the Safeway Federal Credit Union in northeast Spokane. Dustin Rockstrom, 24, Gregory Rockstrom, 21, and their half-brother, Brad Rockstrom, 24, were arrested Wednesday when FBI agents and Spokane police officers served arrest and search warrants at 6010 and 6014 N. Nettleton and 906 E. Rich.