This list covers all minor criminals mentioned in Season Seven.
Ronnie Green and Carlos Jackson
Two African-American men who invaded the home of future serial killer and family annihilator Trevor Mills, leaving Trevor's father and sister dead and Trevor's mother in a near-vegetative state after raping her. Both were later incarcerated for the crimes. They were hired by real-estate businessman Clark Preston, who intended to start a crime wave he would benefit from economically when property values plummet as a result.
The mother of James and Lara Heathridge, Catherine, a.k.a. "Cate Harris", was a textile heiress who had a minor part in the Shakespeare play The Merry Wives of Windsor. Because of this, she had a psychotic breakdown and believed that the lead actresses were "the Devil's Wives", leading her to stab one of them; whether or not this actress died from her wound(s) is unclear. Afterwards, she used a meat cleaver to chop off the left of arm of then-infant Lara. Because of this, she was institutionalized at St. Baldwin's Psychiatric Hospital, which was closed down after a fire left six, including Catherine, dead. It was assumed that Catherine herself started the fire.
An organization that murderer and abductor Malcolm Ford was a member of, whose members were sadomasochists who treated and referred to their wives as "slaves". Malcolm and possibly other members have also abducted women to induct as their own slaves through a contract. The ring had complex, criminal traditions; some of these included storing children between members and their slaves in a location called "The Cabin", threatening slaves that their families would be tracked down and killed should they try to escape, and torturing slaves through various methods. The organization was otherwise unspecified, as the BAU was more focused on Malcolm, though by the end of the episode, it can be presumed that the organization's members were tracked down and arrested, while the victimized slaves and children were freed.
Georgina Yates's rapist
An unidentified man who raped a then-16-year-old Georgina Yates, resulting in her pregnancy and the birth of her son Thomas. No further details on the case have been specified, and it appears the man was never caught. He is likely deceased during the events of the episode.