The former Friendswood dentist is still in custody, according to the state of Texas, but will be released after approval Friday with the completion of a program.
"I'm happy she's being paroled out of jail. I hope for the sake of Clara and her family, her children, that she leads a successful life," George Parnham, Harris' criminal trial attorney, told Eyewitness News.
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The murder rocked the Friendswood and Clear Lake communities where Harris and her husband, David, had dental offices. At the time, they were a successful couple with toddler twin boys. David Harris had a teenaged daughter from a previous marriage.
In July 2002, Clara hired Blue Moon Investigations to follow her husband. As a private investigator sat outside a Nassau Bay hotel on surveillance, Clara confronted David and his girlfriend inside. She was enraged. Video from the private investigator's camera shows Clara repeatedly running over David with her Mercedes Benz. David's teenaged daughter was in the passenger seat.
"If it wasn't for the video that Blue Moon Investigations had, I don't think David Harris would have had justice," said Bobbi Bacha with Blue Moon Investigations. "The video told the truth and Clara couldn't wiggle out of it."
WATCH: What you need to know about Clara Harris
Clara Harris was found guilty of murdering her husband, and on February 14, 2003, she was sentenced to 20 years in prison and fined $10,000.
Harris was denied her first chance at parole on April 11, 2013, and her second chance in September 2016. She's been locked up in the Mountain View Unit in Gatesville.
RAW VIDEO: The Clara Harris crime scene
PHOTOS: The Clara Harris murder case