Dominique Ellen Dunne, II

Dominique Ellen Dunne (November 23, 1959 – November 4, 1982) was an American actress. She appeared in several films and television series from 1979 to 1982, but was best known for portraying Dana Freeling in the 1982 horror film Poltergeist.

On October 30, 1982, Dunne was strangled by her ex-boyfriend, John Thomas Sweeney, in the driveway of her West Hollywood home and went into a coma. She never regained consciousness and died five days later. In a controversial court case, Sweeney was convicted of voluntary manslaughter in Dunne's death and served three and a half years in prison.

https://en.wikipedia.org/wiki/Dominique_Dunne