Dominique Dunne died after being strangled by her ex‑boyfriend, John Thomas Sweeney, outside her home on October 30, 1982; she fell into a coma and was removed from life support five days later, on November 4, at age 22.

Quick Scoop: What Happened

  • On the night of October 30, 1982, Sweeney came to Dunne’s home in West Hollywood, reportedly to talk about their breakup and attempt a reconciliation.
  • An argument broke out on the driveway/porch area, during which Sweeney strangled Dominique until she lost consciousness and collapsed.
  • A friend inside the house, actor David Packer, heard the struggle, eventually went outside, and found Sweeney over Dominique in the bushes.
  • Police and paramedics arrived to find her not breathing; Sweeney admitted at the scene that he had choked her and said things like “I killed her” and “I didn’t think I choked her that hard…I just kept on choking her.”
  • Dominique was rushed to Cedars‑Sinai Medical Center, placed on life support, and diagnosed as having no brain activity due to lack of oxygen.
  • On November 4, 1982, after several days without improvement, her parents agreed to withdraw life support, and she was pronounced dead at 22.

Legal Aftermath (Brief)

  • Sweeney was charged and ultimately convicted not of murder but of voluntary manslaughter in Dominique Dunne’s death.
  • He received a sentence of 6–7.5 years and served about 2.5–3 years before being released on parole, a result that caused public outrage and was closely covered by Dominique’s father, writer Dominick Dunne.

Context and Ongoing Discussion

  • Dunne was best known for her role in the 1982 film Poltergeist , and her killing is often cited in discussions of domestic violence and the criminal justice system’s handling of intimate‑partner homicide.
  • Recent articles and documentaries, including those tied to renewed interest in the Menendez brothers trial and in her brother Griffin Dunne’s memoir, have brought her story back into the spotlight, leading to new forum and social‑media conversations about how her case was prosecuted.

TL;DR: Dominique Dunne died in November 1982 after her ex‑boyfriend strangled her during a confrontation outside her home; she never regained consciousness and was taken off life support five days later.

Information gathered from public forums or data available on the internet and portrayed here.