Jennifer Jareau

Jennifer Jareau is a special agent that often acts as a liaison with police and media officials.

Background
JJ once went on a date to a Washington Redskins game with Reid, but little has come of it romantically. JJ graduated from East Allegheny High School near Pittsburgh, PA, where she was the captain of the varsity soccer team her senior year and earned an athletic scholarship to the University of Pittsburgh. She is a fully qualified federal agent, but has stated that she does not want to become a profiler.

Season 1
Being the media/police liaison, Jennifer has spoken much to the press in an effort to get the media to indirectly assist in investigations. She also assisted Hotch in getting information from killer Jacob Dawes.

Season 2
During one case, she accidentally stumbled upon a barn full of dogs who were known to eat human flesh. Though she survived by shooting them all, the event left her with brief psychological scars. At one point while safe and washing her hands, she hallucinated that one of the dogs was behind her, and ended up almost shooting Prentiss. She seems to have recovered in subsequent episodes. In the episode "North Mammon" in Season 2, after playing a key role in the case, she responds to Hotch's question about if she ever thought about becoming a profiler by saying that she likes being the voice on the end of the phone that the Detective or relatives of victims can talk to.

In the episode Jones she meets Detective William LaMontagne Jr. It is obvious they attracted to each other and at the end of the episode she gives him her number.

Season 3
In middle of the FBI she shot and killed a man, this had little efect on her then the dogs she shot. It is revealed to the viewers in episode 3x18, The Crossing, that JJ is pregnant. Also, secretly, after meeting Detective Will LaMontagne Jr in "Jones" they have been romantically involved ever since. She went into labor in "Memoriam" and has since returned in season 4 to introduce the team to her baby.