Susan R. Thompson made false statements to investigators about placing the flag on the desk.
Authorities believe Joey Meek knew about Dylan Roof's plans for the June massacre.
A guilty plea could mean life in prison instead of the death penalty.
Attorneys have not said if Roof would enter a plea on Friday.
Roof is accused of fatally shooting nine African-American worshippers in Charleston, South Carolina.
Dylann Roof is accused of fatally shooting nine people in Charleston last month.
Roof is accused of killing nine African-American worshippers at a church in Charleston last month.
"Strike at the Black church, and you strike at the heart of Black American life," wrote David A. Love in the 'Atlanta BlackStar.'
Republicans have made it impossible for the IRS to revoke the tax-exempt status of political groups.
Dylann Roof last week told police he wanted to purchase an AR-15 when they stopped him earlier this year.
The desire stems from a form of Christianity with a dark and largely unrecognized history.
President Barack Obama gave the eulogy for the late reverend and state senator, Clementa Pinckney.
A hundred fifty years after the end of the Civil War, the Confederacy is on the run.
Parks will still allow the sale of books and educational materials that depict the flag in historical context.
People resumed gathering a week after the deadly shooting at Emanuel AME Church.
A Civil War descendant speaks out on the battle flag: "It should be put in its proper place."
Police arrested and charged 21-year-old Dylann Roof with the murder of nine people in a church.
Angry crowds marched on the Statehouse to demand the flag be taken down on Saturday.
Multiple victims' family members told the alleged suspect that they forgave him.
A 15-year-old compromise in a decades-long fight makes moving the flag a daunting legislative task.
The incident left nine African American worshippers dead.
South Carolina is one of 31 states where the death penalty is legal.
Historian calls out the state on Twitter for honoring the flag after a suspected hate crime.