A Familiar Face in the Dark: The Murder of Dolly Prioriello

The Ride Home

Mississauga, Ontario — May 6, 1982

Darlene Prioriello, known to most people as “Dolly,” was only sixteen years old when her life was cut short in one of the most disturbing murder cases to come out of suburban Ontario during the early 1980s. Friends remembered Dolly as cheerful, trusting, and social—a teenager who loved spending time with friends, talking about music, and planning for the future like every other girl her age. She came from a close Italian-Canadian family in Mississauga, where relatives described her as caring and energetic, someone who rarely stayed still for long. To her family, she was still just a kid trying to figure out life.

Mississauga during that time still carried the feeling of safety. Neighborhoods were quiet, buses ran late into the evening, and teenagers often moved around town freely without much fear. Parents worried, of course, but there was still a belief that familiar streets and familiar faces meant protection.

That belief would shatter on May 6, 1982.

That evening, Dolly had been spending time with her boyfriend before beginning the trip home. She eventually stopped near a bus stop not far from her neighborhood, waiting alone in the cool night air. Witnesses later recalled nothing unusual about the scene. It looked like any normal suburban night.

Then a car pulled over beside her.

Behind the wheel was seventeen-year-old David James Dobson.

Dobson was only a year older than Dolly and reportedly knew her casually through overlapping social circles in the area. While not considered close friends, they were familiar enough with each other for Dolly to recognize him and feel some level of comfort. Investigators later learned that Dobson had struggled with emotional and behavioral problems long before the murder. People who knew him described him as quiet at times, but also capable of sudden anger and unpredictable behavior. Some later claimed he had difficulty fitting in socially and often seemed disconnected from people around him.

David offered Dolly a ride home.

At first, she reportedly refused.

But according to later accounts, Dobson continued insisting, telling her it was late and there was no reason for her to wait for the bus. Eventually, Dolly got into the car.

It would be the last confirmed time she was seen alive.

The Attack and Crime Scene Details

After convincing 16-year-old Darlene "Dolly" Prioriello to get into his vehicle under the guise of giving her a ride home from the bus stop, 17-year-old David James Dobson drove her to a secluded field behind a factory/warehouse in Mississauga, Ontario.

Once isolated, Dobson subjected the Grade 9 student to a prolonged, horrific assault:

• Sexual Violence: Dobson violently raped and physically mutilated Darlene. Forensic evidence later revealed he also pierced her body with safety pins.

• Blunt Force Trauma: He repeatedly struck her in the face and head using a heavy concrete construction block.

• The Cause of Death: Pathologists determined the official causes of death were a fractured skull and asphyxiation.

• A Prolonged Agony: Medical evidence presented at trial showed that Darlene did not die instantly; she suffered a slow, agonizing death that took approximately four hours.

While Darlene lay dying in the field, Dobson left the scene, attended a local social party, and then went home to sleep in his bed at his parents' house.

The Motive ("Why")

Court proceedings and psychological evaluations characterized Dobson as a sexual sadist.

• History of Cruelty: Investigation into his background revealed a disturbing history of escalating violence, including torturing small animals and tearing the wings off birds.

• Pathological Desire: The primary motive was an extreme desire for sexual dominance, control, and the infliction of pain, coupled with a complete absence of empathy.

• Thrill-Seeking: His subsequent actions demonstrated that the thrill of the crime was heavily tied to the power he felt over his victim, law enforcement, and the public.

The Cruel Aftermath and Arrest

The Cruel Aftermath and Arrest

Instead of hiding, Dobson aggressively sought attention for his actions:

• The Factory Call: The morning after the murder, Dobson made a frantic phone call directly to the factory adjacent to the field, instructing them to check the property for a dead body.

• Taunting the Family: He placed deeply disturbing phone calls directly to the Prioriello family home, mockingly informing them that he had killed Darlene.

• "Catch Me If You Can": Dobson mailed anonymous letters to the Peel Regional Police. One letter explicitly dared investigators, writing, "Set up your bait and try to catch me . . . See ya next year." He also threatened to abduct and murder a new victim every year on the anniversary of Darlene's death.

• The Arrest: His arrogance led to his downfall. Police successfully traced his taunting phone calls. A week after the murder, Dobson was arrested. Inside his car, forensic teams recovered the exact concrete block used in the assault, which still contained Darlene's blood and hair.

Psychological Toll on First Responders

The graphic nature of the crime scene deeply traumatized the responding law enforcement personnel. The two beat patrol officers from the Peel Regional Police who first discovered Darlene's body were so severely affected that one resigned from the police force entirely within six months, while the other requested a permanent transfer to a desk job for the remainder of his career.

In the days after her disappearance, panic spread through the Prioriello family. Her parents and loved ones searched desperately for answers while police began investigating the teenager’s sudden disappearance. The case quickly shifted from a missing-person investigation into something far darker.

Authorities eventually uncovered evidence linking Dobson to the crime, and investigators concluded that the ride home had turned violent. The details surrounding the murder shocked the community because of how ordinary the situation initially appeared. There had been no dark alley, no masked stranger, no obvious danger waiting in the shadows. Just a familiar face offering a teenager a ride home.

Dobson was convicted of first-degree murder on April 11, 1983, receiving a life sentence with no parole eligibility for 25 years.

• 2004 Security Incident: Dobson was briefly transferred to a fenceless, minimum-security prison. Following fierce public pushback from Darlene’s sister, Terri Prioriello, corrections officials reversed the decision and sent him back to medium security.

• 2007 Parole Denial: In April 2007, Dobson became eligible for full parole. During the emotional hearing, he claimed to have changed, citing his involvement in prison writing clubs and upholstery training. The National Parole Board flatly denied his release, stating they lacked a satisfactory understanding of his capacity for extreme violence.

• The "No Freedom for Dobson" Petition: Because Canadian law allowed inmates to reapply for parole every two years, the Prioriello family launched a major public campaign. They successfully lobbied the Canadian government to increase the mandatory waiting times between parole applications for violent offenders, sparing grieving families from being repeatedly re-traumatized.

For Dolly’s family, the loss became permanent heartbreak. Birthdays, holidays, and family gatherings were forever marked by the absence of the sixteen-year-old girl who never returned home that night. Friends later described lingering fear throughout the community, especially among teenagers who suddenly realized how quickly safety could disappear.

More than four decades later, the story of Darlene “Dolly” Prioriello still lingers because it feels terrifyingly real. A bus stop. A quiet street. A familiar person offering help.

Then silence.

Disclaimer:

Some details in this article may or may not have been exaggerated or stylized for dramatic and horror-focused purposes, which may include sarcasm and humor for storytelling purposes. This piece is intended strictly for entertainment within the dark, horror-true-crime genre and is NOT meant to mock, disrespect, or diminish the real tragedy of anyone's situation or circumstances. Our deepest condolences remain with the victim's family, friends, and loved ones. Sources would be listed below if applicable.