Dylann Roof's confession and journal detail racist beliefs

FILE - In this June18, 2016 file photo, Dylann Storm Roof is escorted from the Sheby Police Department in Shelby, N.C. The trial for Roof, a white man accused of killing nine black people at the church, started Wednesday, Dec. 7, 2016, at the federal courthouse in Charleston, S.C. (AP Photo/Chuck Burton, File) (The Associated Press)

FILE- In this June 18, 2015 file photo, two Charleston police officers stand in front of the Emanuel AME Church in Charleston, S.C. The trial for Dylann Roof, a white man accused of killing nine black people at the church, started Wednesday, Dec. 7, 2016, at the federal courthouse in Charleston, SC. (AP Photo/Stephen B. Morton, File) (The Associated Press)

CHARLESTON, S.C. – Prosecutors are using Charleston church shooter Dylann Roof's own words to portray him as a cruel angry racist at his death penalty trial.

Roof's two-hour confession to killing nine black people at a church Bible study has been introduced as evidence, along with a handwritten journal found in his car when he was arrested.

The videotaped confession shows Roof laughing several times and making exaggerated gun motions as he describes the massacre inside Emanuel African Methodist Episcopal Church in June 2015.

Roof's trial continues next week. His lawyers conceded his guilt, but are trying to spare his life.