Prosecutors say they are planning to appeal the dismissal of Kennedy cousin Michael Skakel's murder conviction to the United States Supreme Court.

Skakel is accused of killing Martha Moxley in Greenwich in 1975. He did not serve time until 2002. In 2013, a judge overturned his conviction. The state Supreme Court reinstated it in 2016. This year, after a key judge retired, the court reversed its own decision.

Dorthy Moxley, the victim's mother, says the case has been dragging on long enough.

"It would be good if they would just drop it," she told News 12 Connecticut over the phone. "But whatever the prosecutor wants to do, I will support him."

The announcement was a notice to file appeal, which does not guarantee that the U.S. Supreme Court will hear the case.

Skakel's defense attorney Michael Fitzpatrick says he doesn't think the nation's highest court will take it up.