TAMPA (FOX 13) - Toward the end of the visit with her brother, she even appeared optimistic about her future.
"Once I get out of here, I'm gonna get a job, get you guys some gifts, get you something nice," she said in a gleeful tone.
Information released also included police interviews with Nachtman's friends. One such interview with friend Jeff Hartman revealed she may have had problems at home.
"She complained about her mom a lot," Hartman told police. "They just didn't have a good relationship. It seemed like, her mother was always on her case a lot, and it seemed, to me, like Nicole's response was to stop trying... She couldn't handle the pressure."
Another friend, Laura Hessemer told detectives Nachtman was stressed and wanted drugs the week of the murders. After the murders, Hessemer said her friend asked for a favor.
A Florida State University student claimed voices told her to kill her mother and step-father, and her behavior with friends, family and detectives afterward might shed light on her frame of mind.
It happened in August, 2015. Investigators said Nicole Nachtman killed her step dad, and then waited for her mom to get home the next day, only to shoot and kill her in the driveway of their Carrollwood home. They said she drove back to school in Tallahassee shortly after.
Hundreds of documents released Wednesday show how detectives tried to unravel the mindset of their suspect.
One occasion, a recorded visit with her brother, portrayed an upbeat, even jolly college girl.
Nicole: "Hey Joey!"
Joey: "Hey, how you doing?"
Nicole: "Pretty good."
The two kept the conversation light, talking about comic books and teasing one another, like brothers and sisters often do. The scene, however, was jail - where Nachtman was being held while the investigation into the alleged murder continued.
Nicole: "I know who my favorite super hero is."
Joey: "Who's that?"
Nicole: "You! (laughs)"
Later in the conversation, Nachtman turns the conversation to how she's doing in jail.
"I actually weighed myself and I wasn't even scared. I have no problems looking in the mirror. My head has been clear. No stress, no anxiety; I've been able to sleep better," Nachtman told her brother.
Nachtman, at times, seemed detached from the reality of her situation.
Nicole: "How's grandma doing?"
Joey: "You know she's okay. Obviously she was upset. We've got family everywhere. That's getting everyone through everything."
Nicole: "And Eric?"
Joey: "Same thing..let's not talk about the case."
"She said, 'Laura, can you please erase the texts about the drugs?'" Hessemer said.
The young defendant faces two counts of murder. If convicted, she could be sentenced to death.