"[Brae] tried everything she could to stop her brother Nathan Gann from killing their father Timothy MacNeil," he said in his opening.
And Ricardo Garcia, Nathan's attorney, had yet another version of the crime -- one in which Nathan played no part at all.
"[Brae] confided in friends that she wanted to have her stepfather killed and wanted him dead," Garcia argued. "At the end of this you'll realize that Nathaniel Gann did not shoot and kill Timothy MacNeil ... he had no motive, no reason."
Brae's jury heard Brae's entire riveting confession, in which her demeanor on the grainy interrogation room video ranged from scared little girl to cavalier and even at times, flirtatious.
Nathan's jury, on the other hand, heard a circumstantial case based mostly on physical evidence -- and Nathan's defense attorney managed to poke holes in much of the prosecution's theory.
While at first it seemed there was no good motive for the murder, one possible reason did emerge -- jealousy.
Brae had become used to having MacNeil all to herself. But MacNeil had recently fallen in love with a woman named Kim. In her confession, Brae admitted that she wasn't happy about this development.
"He was basically going to cut me out of his life completely," she said in the videotaped statement. "I knew he'd already chosen his girlfriend over me and it hurt really, really bad because this was the man I thought loved me, and was my dad."
When MacNeil asked her to move out, Brae said they had a horrible fight that prompted her to make the phone call to Nathan that would set everything in motion.
"I basically ask him to calm me down," Brae told Fulginiti about the call. "...Instead, he said, 'Well, ya know, what if he weren't there anymore?' And I was like, 'Well, ya know, that would be ... kinda cool.'
"I was very hurt, I was very angry," Brae continued. I wanted [MacNeil] to hurt like he had hurt me."
In closing arguments at the trial, prosecutor Bennett posited that Nathan was the killer, but he had the harshest words for Brae.
"...This is a monstrous crime," he told the jury. "She never tried to withdraw from any conspiracy, it just got messy ... And the only reason that [MacNeil] ended up like that is because of her and because of her brother."
He pointed to Brae, crying at the defense table. "And those tears, and that expression is too late!"
In their closings to two separate juries, Brae and Nathan's defense attorneys did a thorough job of fingerpointing, each singling out the other's client as the main perpetrator.
Everyone waited while the juries deliberated. Would they convict one sibling and let the other go free? Could they acquit both defendants? Would there be another mistrial?
For the police, the wait was even harder to endure because they knew something the juries would never know: the night after the murder, Nathan had actually confessed to being MacNeil's killer.
After Nathan asked police for a lawyer during his interrogation, Detectives Smith and Burkett got up to leave the room but Nathan unexpectedly called them back, saying he would waive his rights. What followed was a chilling step-by-step recounting of a murder.
He described the struggle with MacNeil and the gun, and even volunteered to act out the killing for the detectives.
"Did you feel like you had to shoot him?" asked Smith on the tape.