I totally disagree with the description that Dominique was "killed by the man who loved her". This man never loved her. He was (is) a totally selfish person who never really respected Dominique, but he treated her like an object he's possessing. Towards others he always pretended to be a caring boyfriend, but alone with her, he abused her both physically and mentally on numerous occasions. He never showed any remorse for the murder. In front of inmates he mentioned that "Dominique was a snob who deserved what she got". And not to forget the travesty of justice, when he was allowed to slander Dominique and when he told the most terrible lies about her in the courtroom. Dominique herself realized that Sweeney doesn't love her, but that he's obsessed with her, regarding his extreme jealousy and violence.
This is a very important point to me, since Sweeney successfully convinced the jury and probably some more people that Dominique Dunne wasn't murdered, but that it was a tragedy because of the passion of a desperately loving man who merely lost his self-control. Unfortunately, many people like the imagination of tragic romances and they like to believe those words.
The Dominique Dunne Site