Harvey Nichols beauty consultant Clare Bernal had briefly dated store security guard Michael Pech, but after months of stalking, he shot her dead in front of customers before turning the gun on himself.

Hollie Gazzard's boyfriend Asher Maslin was a charmer, and her family were unaware of his violent history. But his mask began to slip, and he stalked Hollie for months before stabbing her in broad daylight.

University student Molly McLaren's friends reveal how her Mr Right turned into her brutal killer.