This list covers all minor criminals mentioned in Season Six.
A man who was fatally shot with a silenced 9mm pistol, whose death remained unsolved. He was suspected of being the father of a child whose mother was the wife of James Thomas.
A man who was fatally shot with a silenced 9mm pistol, whose death, much like Bob Atkins, remained unsolved. Like Atkins, he was also suspected of being the father of a child whose mother was the wife of James Thomas.
Unnamed silenced 9mm killer
A man who fatally shot another unidentified man with a silenced 9mm pistol. The case remains unsolved. The victim was suspected of being the father of a child whose mother was the wife of James Thomas.
Michael Kosina's previous accomplices
The accomplices of then-serial rapist Michael Kosina in northern Louisiana, who both disappeared after being killed by Michael himself following a series of rapes in the area. The police pinned the crimes on them as a result until Michael's death.
A serial killer in North Dakota known as "The Redmond Ripper", Charles Beauchamp is the father of FBI cadet Ashley Seaver. When she was a child, he killed 25 women over the course of 10 years. His nickname suggests their deaths were very brutal and bloody. He was extremely protective of his daughter and was terrified of letting her out of the house because he knew there were more men like him outside. He tried very hard to be a good father and would give her all the toys she wanted, though he refused to have any pets in the house because he knew he couldn't control his homicidal urges around them.
In the end, he was arrested by Rossi and Hotch. He would later say it was the best day of his life as it meant he no longer had to hide and wouldn't hurt anyone else. Because of that statement, it is possible that his killings, or at least a portion of it, were acted out of compulsion. He is currently in prison, since North Dakota doesn't have capital punishment, and is very likely serving life sentence with no possibility of parole. He sometimes writes to Seaver, though she never reads his letters.
A Miami street gang mentioned in the episode. Its signature was cutting off the arms and heads of their victims with machetes, hence the name. Julio Ruiz was a member of Los Machetes in his youth.
A resident of an apartment complex in which the unsub claimed another victim, Hadley shot a cleaning man in the genitals when he learned that his wife was sleeping with him. It is unknown if the victim survived.
A man who robbed a liquor store on April 6, 2010, and subsequently led the police in a high-speed car chase. The chase ended abruptly when he collided with a car driven by future spree killer Shelley Chamberlain, killing her son Damien, who was celebrating his sixth birthday that day. He was later arrested and incarcerated for his crimes. Waters was also responsible for the death of a police officer that made headlines, though it is unknown as to how exactly he was able to kill the officer. However, considering he was never charged for murder, but instead vehicular manslaughter, it is extremely likely the officer died from being hit by Waters's car during the chase as well.
A sex offender convicted of fondling his girlfriend's six-year-old son.
A sex offender convicted of flashing a woman.
A coworker of Morgan's cousin, Cindi, who began stalking her in 2004. Though they only went on one date and shared one goodnight kiss, he started calling her constantly and sending her gifts that she returned. Ultimately, his stalking became so severe that she fled the state and went to Charleston. She did so on Morgan's advice, as he knew Hitchens was a power-assertive stalker and that it would most likely end badly if the stalking continued.
Two weeks after Cindi disappeared, Hitchens was shot and killed by Malcolm Ford, a man also stalking Cindi, who made it look like a suicide, before he abducted Cindi. At the time, the police figured Hitchens had killed Cindi, though there was no body. However, this was eventually proven to be false on the episode's follow-up, The Company.