The man accused of opening fire at Washington's Holocaust museum died, Wednesday, at a North Carolina prison hospital.
James von Brunn died shortly before 1 p.m, Butner federal prison spokeswoman Denise Simmons announced.
The 89-year-old was awaiting trial for killing security guard Stephen T. Johns during a shootout at the U.S. Holocaust Memorial Museum in June 2009.
Von Brunn was also wounded in the shooting.
Prison officials said he had a "long history of poor health," including congestive heart failure.
Authorities believe Von Brunn was a white supremacist who posted racist and anti-semitic comments on the Internet before his arrest.