Student lured into a warped sex game - then murdered by her friends

Elizabeth ‘Lizzi’ Marriott, 19, had just started to study marine biology at the University of New Hampshire – it was the perfect subject for Lizzi, who adored nature and was always rescuing animals in need.

The university was a few hours away from her home town in Massachusetts, so she was living with her aunt and uncle during term time. The young, trusting student was keen to make friends and settle in.


On October 9, 2012, Lizzi told her aunt and uncle she was going to a friend’s house and she’d be back by midnight. The following day, she still hadn’t returned and her family assumed she’d stayed the night.

But as the hours ticked by, they started to panic. It was very unlike Lizzi not to be in touch. Her parents reported her missing and jumped in the car to search for her.

Lizzi with her parents Bob and Melissa

Lizzi’s last text had said she was visiting a girl called Kat. Police figured out that was Kathryn McDonough who worked with Lizzi at the local department store.

Kat, 19, had acted like a regular teenager before she’d met her boyfriend Seth Mazzaglia, 39, a year earlier. She’d quickly moved in with him, dropped out of school and stopped contacting her family.