Criminal Minds: Evolution star A.J. Cook opens up about how her real life influenced her character, JJ. Criminal Minds aired on CBS for 15 years, followed by a short break before the show was revived on Paramount+ as Criminal Minds: Evolution. The show tracks the members of the FBI's Behavioral Analysis Unit (BAU) through some genuinely horrifying cases, and JJ, along with her work family, changed a lot through the years, as she deals with the trauma that comes with tracking down serial killers for a living.
https://screenrant.com/criminal-minds-evolution-jj-story-aj-cook-influence/