Skip to content

Murder of Elizabeth 'Lizzi' Marriott

2012–2016

New Hampshire · United States · 2012

Content note — This case involves an allegation or finding of sexual assault.

Choose email alerts for changes to this case's timeline or coverage.

Elizabeth "Lizzi" Marriott was a 19-year-old from Westborough, Massachusetts, who loved the ocean and marine life. She had volunteered at the New England Aquarium, and in autumn 2012 she began studying marine biology at the University of New Hampshire, living with family in Chester and working part-time at Target. On 9 October 2012 she went to visit a co-worker, Kathryn McDonough, at the Dover apartment McDonough shared with Seth Mazzaglia, and did not come home. Mazzaglia was arrested on 13 October 2012. McDonough pleaded guilty in July 2013 to hindering the investigation and testified at his trial. On 27 June 2014 a jury in Dover found Mazzaglia guilty of first-degree murder, and he was sentenced to life without parole. Searchers never found Lizzi's body. In 2016 the New Hampshire Supreme Court kept her private records sealed after her family objected, and upheld the conviction.

New Hampshire

At a glance

Defendant

Seth Mazzaglia

Timeline· 24 entries

Showing 15 of 24

Source

Entries linked to a court, prosecutor, police, or government source.

Type
  1. Investigation
  2. 9 Oct 2012 · Tuesday

    Disappearance, investigation event

    Lizzi goes to visit a co-worker in Dover after her evening class and does not come home

  3. 11 Oct 2012 · Thursday

    Update, investigation event

    Family raise the alarm; search begins at Peirce Island, Portsmouth

  4. 13 Oct 2012 · Saturday

    Arrest, court event

    Seth Mazzaglia arrested and charged with second-degree murder

    Source clippingThe Boston Globe
  5. 15 Oct 2012 · Monday

    Hearing, court event

    Mazzaglia arraigned in Dover; held without bail

    Strafford County, New HampshireNorth Adams Transcript
    Source clippingNorth Adams Transcript
  6. 24 Dec 2012 · Monday

    Arrest, court event

    Kathryn McDonough arrested for hindering prosecution

  7. 10 Apr 2013 · Wednesday

    Charges filed, court event

    McDonough indicted by a Rockingham County grand jury

    Rockingham County, New Hampshirepatch.com
  8. 18 Apr 2013 · Thursday

    Charges filed, court event

    Mazzaglia indicted on first- and second-degree murder

    Strafford County, New Hampshirepatch.com
  9. 25 Jul 2013 · Thursday

    Plea, court event

    Rockingham County, New HampshireConcord Monitor
    Source clippingConcord Monitor
  10. 26 Sep 2013 · Thursday

    Charges filed, court event

    Mazzaglia indicted on conspiracy charges

    Strafford County, New Hampshirenhpr.org
  11. 19 Nov 2013 · Tuesday

    Charges filed, court event

    Mazzaglia indicted over a jail-break plot

  12. Original trial
  13. 14 May 2014 · Wednesday

    Trial start, court event

    Jury selection begins in Dover

    Source clippingTelegram & Gazette
  14. 20–28May
    Original trial — hearings · 20143 days
    • Tue 20 MayJury selection completed
    • Tue 27 MayJury view of the Dover apartment and Peirce Island
    • Wed 28 MayOpening statements
  15. 27 Jun 2014 · Friday

    Verdict, court event

    Source clippingConcord Monitor

What the source labels mean

Trial record

State v. Seth Mazzaglia

Court
Strafford County Superior Court
Judge
Judge Steven M. Houran
Mode
Jury trial
Dates
14 May 2014 – 27 Jun 2014 · source
Jury deliberation
Less than two days, per NHPR · source

Sitting days

May 2014

MTWTFSS123456789101112131516171819212223242526293031

June 2014

MTWTFSS1234567891011121314151617181920212223242526282930

July 2014

MTWTFSS12345678910111213141516171819202122232425262728293031

August 2014

MTWTFSS123456789101112131516171819202122232425262728293031

Key days

  • 14 May 2014Trial startJump
  • 27 Jun 2014VerdictJump

Chronology· 6 entries

  1. 14 May 2014 · Wednesday

    1. Jury selection begins in Dover

      Jury selectionSource
  2. 20 May 2014 · Tuesday

    1. Jury selection completed

      Jury selectionSource
  3. 27 May 2014 · Tuesday

    1. Jury view of the Dover apartment and Peirce Island

      OtherSource
  4. 28 May 2014 · Wednesday

    1. Opening statements

  5. 27 Jun 2014 · Friday

    1. Jury finds Mazzaglia guilty of first-degree murder

      VerdictSource
  6. 14 Aug 2014 · Thursday

    1. Mazzaglia sentenced to life without parole

      SentencingSource

Coverage· 22 entries

Explore podcasts, documentaries, books and reporting. Save something for later or record what you've finished.

Showing all 22 — Show less

Know a podcast, documentary, book or magazine about this case?