
WAS HABEN SIE IHR NUR ANGETAN ... Warum musste Lizzi Marriott sterben ?
This video reconstructs the tragic disappearance and murder of 19-year-old marine biology student Elizabeth 'Lizzy' Merriett from New Hampshire.
Disappearance on October 9, 2012
- Lizzy attends an evening chemistry class at the University of New Hampshire.
- She tells her family she will visit her coworker Katherine 'Cat' McDonough in Dover afterward and be home by midnight.
- The last activity on her cell phone is logged at 10:00 PM in Dover. Lizzy never returns home.
Investigation and Turning Points
- Her car, a 2001 Mazda Tribune, is found days later on the university parking lot, raising questions since she must have driven it to Dover.
- Cat McDonough initially claims Lizzy never arrived. Her boyfriend, 29-year-old Seth Mazzaglia, confesses that Lizzy was in their apartment and died during a "consensual intimate moment."
- Police uncover evidence contradicting an accident: loud screams, discarded clothing with DNA traces, and black gloves.
- Investigations reveal Seth and Cat were in a relationship characterized by dominance and control and were actively seeking a third person online.
Trial and Verdict
- Cat McDonough accepts a plea deal and testifies against Seth. She admits to luring Lizzy to the apartment under the pretense of a movie night.
- Her testimony describes Seth strangling Lizzy from behind with a rope after she refused his sexual advances. Both then disposed of the body in the Piscataqua River and destroyed evidence.
- Seth Mazzaglia is found guilty of first-degree murder on June 27, 2014, and sentenced to life in prison without parole.
- Katherine 'Cat' McDonough receives a sentence of 1.5 to 3 years and is released in July 2016, causing anger and disappointment for Lizzy's family.
Video Conclusion
The case is considered solved despite the body never being found. The video creator believes Seth Mazzaglia is the sole murderer and understands the family's frustration over Cat's lenient sentence.






