This list covers all minor criminals mentioned in Season Nine.
The head of the Southern Aryans, appropriately nicknamed "The General", who fatally shot a black Dallas councilman named Adrian Clay in a parking lot with a .308 Nemesis Arms Vanquish rifle three months prior to the episode. He was arrested for an unrelated charge, and currently was going through a trial for Clay's murder. Coincidentally, an Assistant District Attorney who was going to prosecute him for the killing was later murdered alongside five others by a sniper.
An enraged male who killed his former girlfriend and her "community angel" in 2007, having found them by breaking into the computers of a battered women aid service, before committing suicide.
A Chicago robber who spent time in the same prison as future spree killer Eddie Lee Wilcox, who would become his partner when the two were released. Together, they robbed a pawn shop on October 20, 2013, and Corbone shot and killed the owner and a customer that was present. Horrified, Eddie argued with him, and Corbone then tried to shoot him, but his gun jammed. Eddie promptly fired back with his .45-caliber Kimber Warrior pistol, emptying its magazine on him, even after he was dead. Corbone was also connected to the Riggio family, a Mafia organization operating in Chicago.
The Riggio family
A Mafia organization operating in Chicago. Robber and killer Christopher Corbone was connected to them.
Unnamed sect member
A member of a utopia sect who, in 2008, murdered a woman by burying her under a pile of rocks as an honor killing. He was later arrested and serving out an unspecified sentence in prison. Coincidentally, the second victim of serial killer Leland Duncan was killed in a similar way as the member's honor killing, which led to initial suspicion on the sect and its leader.
A repeat voyeur, stalker, and burglar who started a long rap sheet when he was in high school by looking into the girls' locker room. He attracted the attention of Leland Duncan after he set his sights on a woman named Yvonne Carpenter. As a result, Leland abducted, tortured, and murdered him by hanging him in a public city square.
Killer of Danny Miller
An armed robber who killed Danny Miller, the brother of SSA Alex Blake, when he tried to intervene in the robbery. According to Rossi, the robber had accomplices, with the entire group "being on PCP", and Danny's partner was also shot.
An eighteen-year-old teenager who, on February 1, 2003, murdered Emma and Teddy Walsh, the son of future spree killer Clifford Walsh, during a home invasion and robbery. He was caught the next day, but only sentenced to ten years in prison due to the influence his father had on one of the jurors of his case. He would later die in a random prison fight before he could be released, thus triggering Clifford's spree. It was later revealed that Clark planned the robbery with Teddy, but it got out of hand when he took meth prior to the robbery, making him erratic and uncontrollable, thus leading to the murders.
Las Vegas sewer vagrants
A group of homeless people living in the sewers, which loyally followed the orders of Marvin Caul to commit numerous pick-pocketing and con crimes across the city.
A drug dealer who shot and wounded the Sheriff with an automatic firearm of Silverton, Texas, during a drug raid. However, considering that a corrupt Sheriff's Deputy wrote the report with the intention of covering up the Sheriff's eventual murder, it is unknown if at least part of the events were true.
Unnamed child serial killer
A serial killer who Rossi investigated prior to his temporary retirement from the BAU. He targeted children, abducting and killing at least five, and was about to kill a sixth when he was finally identified and arrested. Immediately afterwards, Rossi would find out that his then-wife Carolyn had divorced him after it turned out he forgot their wedding anniversary.