At the time of the assault, Jones was being held on $500,000 bail in connection with the shooting of rival drug dealer Richard Isaac, who took 10 bullets during an attack and was paralyzed from the waist down. Jones was later transferred to Holmesburg Prison.
Jones and co-defendant Samuel Brown were later acquitted in connection with Isaac's shooting.
A Common Pleas jury in October convicted Jones, of 51st Street near Cedar Avenue in West Philadelphia, of aggravated assault based on testimony of two corrections officers. Both said Jones repeatedly stabbed Barnes because Jones believed Barnes did not show him proper respect on the prison block.
After the conviction - Jones' first - Herron revoked his $500,000 bail and ordered him held pending sentencing. Assistant District Attorney David Novak presented two days of testimony at the sentencing hearing, trying to prove Jones was the leader of the "most violent crime organization in Philadelphia" and represented "a very large danger to the city."
Detective Walter Hoffner, who has been investigating the JBM for three years, testified that Jones was "the general manager of the JBM. He controlled the distribution of cocaine in the different sections, and he was in charge of enforcement."
Jones was arrested Saturday in Holmesburg Prison and charged with the aggravated assault of a Holmesburg inmate, Hugh Moore, who was beaten and burned with cigarettes Dec. 8. Jones and two reputed JBM members, Brian Thornton and Rodney "Frog" Carson, were charged with beating Moore because they were seeking information from him about the slaying last year of a JBM leader, Leroy "Bucky" Davis.
If convicted, Jones faces an additional 10- to 20-year prison sentence, Novak said.
Jones' attorney, Gerald A. Stein, said he planned to appeal. "I believe Aaron Jones received an unfair trial. I believe the sentence is unreasonable, and the court made findings that are not supported by the evidence," Stein said.
But Herron said the evidence showed that Jones operated by "use of terror and intimidation. The message is: 'You don't mess with Aaron Jones.' That is a message of horror and untamed power," the judge said.