The trial over the 2015 greenway stabbing death of a Knoxville woman is underway.

Timothy Ison is in court in the murder trial of 42-year-old Stefany Fairbanks. A jury was seated in the trial Monday, and the first witnesses took the stand Monday afternoon.

Police said they do not believe Ison knew Fairbanks when they said he stabber her on Third Creek Greenway back in May 2015. 

Knox County prosecutors said in January 2016 they are seeking a conviction that will put the Knoxville man behind bars for the rest of his life with no chance of parole.

At the time, District Attorney General Charme Allen was also signaling she would not seek the death penalty against Ison.

Authorities allege Ison stabbed Fairbanks to death as she walked on the greenway within sight of Sutherland.

Witnesses recalled the attack in the summer of 2015 during a probable cause hearing.

Esther Campbell testified she was riding bikes with a friend and saw Fairbanks walking toward them on the greenway with Ison very close behind her, as though it was just two people walking together single-file. When the cyclists got within 40 yards of Fairbanks, Campbell said the victim tried to get away.

She said Fairbanks screamed for help. The victim was attacked.

Campbell went to help. She testified Ison just walked away after stabbing Fairbanks.

When he was 14, Ison attacked a couple in their Holston Hills area home. He was placed in juvenile custody until he turned 19 after that incident. He later was convicted of assault in Kentucky.