A New Hampshire woman is free after serving a three-year prison sentence for luring a co-worker to her apartment in 2012 as a sex offering to her domineering boyfriend, then helping him dispose of the co-worker’s body after authorities say he strangled and raped her.
Corrections spokesman Jeff Lyons said Kathryn “Kat” McDonough was released from the Goffstown women’s prison at 12:05 a.m. Saturday.
The 22-year-old pleaded guilty in 2013 to lying about the death of 19-year-old Elizabeth “Lizzi” Marriott, of Westborough, Mass. She testified against Seth Mazzaglia, saying their sexual relationship included bondage and sadomasochism. He’s serving a sentence of life without parole.
Marriott was killed only weeks after beginning her sophomore year as a marine biology major at the University of New Hampshire in Durham. She had worked with McDonough at a department store. Her body has not been recovered.
McDonough first told investigators that Marriott died during rough sex between them. After getting immunity from prosecution, she changed her story, saying Mazzaglia killed Marriott after she rejected him.
“You had the chance to do the right thing — to try to help, to do something heroic,” Marriott’s father, Bob Marriott, said at McDonough’s sentencing. “Your failure in that moment is why Lizzi is not here to live out her life.”
McDonough declined an interview request from the Associated Press, and her attorney did not respond to a message seeking comment.