Summer 2005, when Louisa was 19, she met Scott at a betting shop in Kilburn, north-west London, where he lived.
She had moved to the area and was desperate for a job.
She says: “He was funny and charming. At first we were friends but when I started working at the betting shop we began dating a few months later.
“He seemed like a normal, nice guy — someone I could trust and depend on.”
But when Louisa moved in with Scott a year later, she noticed changes in his personality. She recalls: “There were little things at first, like him wanting to know where I was going and who I was with.