Eventually, Roberta tracks down her son, who is holding a young woman hostage in a house Roberta grew up in. With a gun trained on Everett, Roberta (with help from the BAU) convinces him to release the hostage. When a tearful Roberta falters slightly, Everett seizes the moment to subdue his mother and set off an explosion in the home's basement. Though Everett escapes, Roberta dies as the house explodes. Everett would later die in the series finale.
As she was never the true unsub of her episodes, little is known about Roberta's past. During the conversation with Everett's father, she says that Everett takes after him since he also likes to hurt women. As the man makes no effort to deny the thinly veiled accusation, it's likely safe to assume that Roberta suffered some type of abuse in at least one relationship. However, without the benefit of a BAU profile, viewers will never know what initially drove her to become a masterful con artist. The true circumstances surrounding the murder of her boyfriend are also unclear as the crime is denoted as domestic violence.
Roberta's motivations are much clearer when she kills Everett's father as revenge for the death of her granddaughter. One thing, however, is certain. Roberta's con artist life set the stage for her granddaughter's murder and the death of her son — the final unsub in "Criminal Minds" — as well as the horrors inflicted on their dozens of victims.
