Mar 5, 2014
Feb 26, 2014
Feb 19, 2014
Feb 6, 2014
Girlfriend in Marriott murder expected to plead guilty
Kathryn "Kat" McDonough, 19, of Portsmouth is expected to change her plea and be sentenced on July 25 in Rockingham County Superior Court as part of a deal struck with state prosecutors.
The anticipated guilty plea could signal that state prosecutors have turned McDonough into a key witness in the upcoming murder trial of her boyfriend, Seth Mazzaglia, who is charged with killing Marriott at his Dover apartment on Oct. 9.
Assistant Attorney General Peter Hinckley refused to comment on Marriott's scheduled plea hearing, or what effect it could have on the prosecution of Mazzaglia.
Marriott, a University of New Hampshire sophomore, was either strangled or suffocated to death on the night of Oct. 9, according to prosecutors.
Investigators spent months focusing along the Piscataqua River in Portsmouth and the edges of Peirce Island, where Mazzaglia claimed to have dumped Marriott's body.
"Our tendency was to believe that she was likely cooperating with authorities," Thompson said.
She remains free on bail. McDonough is accused of lying to police about her whereabouts on the night of the murder, and giving a fictional account of what she and Mazzaglia did on the day Marriott disappeared.
McDonough's lawyer, Andrew Cotrupi, could not be reached for comment on Monday.
During an interview in May, he remained circumspect about McDonough striking a plea deal with prosecutors, or whether she would become a state witness in her boyfriend's murder trial.
"She has nothing but regret to be involved in any way" in the events leading up to Marriott's death, he added.
"I think the evidence will be significantly different from the accounts some people have made," Cotrupi said.
State police were led to McDonough because of a single text message Marriott sent to a friend just hours before she was last seen.
Each of the charges against McDonough are Class B felonies, punishable by 3½ to seven years in state prison.
READER COMMENTS: 0
- Manchester-based scam roofer going to prison for making promises, taking money - 0
- Rochester shooting investigated - 0
- UPDATED: Manchester police recover $11,000 in drugs while investigating domestic assault - 1
- Somersworth mother charged over statements in abuse case against Rochester boyfriend - 1
- UPDATE: Rochester man says he held girl, 3, in headlock for wetting the bed - 1
- Nine arrested in Ossipee drug sweep - 0
- Litchfield woman charged in theft at local grocery store - 0
- UPDATED: Manchester man suffers head injury trying to break up fight - 0
- Former Derry Town Administrator John Anderson asks judge to dismiss charges - 0
READER COMMENTS: 0
- Manchester man who defrauded banks in mortgage foreclosure scheme gets 6 years - 0
- March storm brings accumulation mystery, maybe misery - 0
- Manchester’s Slebodnick stars in Cornell’s title win - 0
- NHIAA Girls’ Div. I final four offers intriguing matchups - 0
- Goffstown voters have lots to consider with schools - 0
- With snow budget depleted, Nashua dips into trust fund - 0
- Police union contract a top concern for Bedford voters - 0
- Proposed school budget creates stir in Allenstown - 0
- Sen. Ayotte vows to fight on after her military sex assault bill passes - 0
Taken for a ride: Hooksett’s Pinkerton deal
Manchester schools project budget surplus