Jacqueline Borden is a severely neurotic local living near the dental office of Dr. Norm Goldman. Borden suffocated Goldman with his own office gas tank when her son Toby died from drinking mouthwash and Jackie thought Goldman drugged and molested him. When Goren and Eames came to her door, she held her daughter Lissa hostage with a butcher knife and confessed to everything. Goren successfully talked her down into surrendering and giving Lissa to them peacefully, speaking sympathetically with the mention of the recent death of his mother Frances.
It was revealed that Goldman only committed the crime of providing the local children mouthwash from his office to get high off of. Unfortunately, it was a bad batch with toxic ingredients which Toby, Desean Colt, and his friends fell victim to, on the part of Leslie Le Zard, who worked at the Food and Drug Administration (FDA) and analyzed the products being shipped, deliberately letting the company's tainted products be distributed so her office would get even wealthier.
Borden was arrested for murder and threatening a child, but considering her mental capacity, she was most likely institutionalized. Her daughter later dies in the care of her grandmother (presumably Jacqueline's mother) after finding and taking the stash of the tainted mouthwash her brother stole.