Described as a "powerful woman," she was perhaps a prosecutor, a CEO, or a political leader.
Carolyn is found dead, having shot herself. Dexter Morgan connects her death to that of two other women who similarly killed themselves - Meghan Dowd and Vanessa Gayle - after finding that they all visited the same therapist, Dr. Emmett Meridian.
Dexter schedules an appointment with the Doctor using the alias, Sean Ellis. Ultimately, he discovers the truth behind the women's deaths after watching their recorded sessions. He finds that Dr. Meridian had prescribed each woman medications and when they became addicted, he abruptly withdrew them. Then, manipulating the women in their depressed states, Meridian was able to convince each woman to kill herself with a handgun.
Dexter himself has a few useful therapy sessions with Meridian before he kills him.
- Humorously, Dexter refers to the three dead women as the "Suicide Sisters."