West Memphis Three
At the time of their arrests, Jessie Misskelley, Jr. was 17 years old, Jason Baldwin was 16 years old, and Damien Echols was 18 years old.
Terrible Trio
A second group of Terrible Trio were a young group of thugs who took on the identities of Batman's old foes. Batman soon realized that one of the members was Lucius Fox's son, Timothy Fox (the Vulture). He and two other friends co-opted the identities of the original trio and tried to rob guests of Bruce Wayne's penthouse, but they were subdued and captured by Batman.
In the "Doctor Mid-Nite" mini series, the three have moved their operations to Portsmouth instead of Gotham, and have become the industrial leaders Fisk, Shackley, and Volper, heads of the investment firm Praeda Industries (Praeda meaning "spoils" or "booty", and sharing a root with the word "predator"). In this story, the Trio adopt their guises as part of rituals they perform to bring good fortune to their endeavors, calling upon the spirits of earth, air, and water. The trio attempt to cause simultaneous disasters to much of the city and its coast, leaving only the property in the worst sections of the city - which they owned and could then resell to enormous profit. As part of their plan, the Trio also operate as drug lords, selling the Venom-based steroid A39 to create an army of superstrong zombie-like soldiers. When Doctor Cross begins investigating their affairs they attempt to kill him, but succeed only in apparently blinding him (unbeknownst to them, he gains the abilities that would make him Doctor Mid-Nite). Doctor Mid-Nite foils their plans for the city, and the members of the Trio are caught and sentenced to a total of 800 years in prison.