Memorial plaque to Niamh Doyle in her sister Louise’s home. “My story comes from love,” says Louise. “It’s not to slate anybody – to slate the gardaí or the girl. It’s just a story that I’m telling. Niamh deserves it.” Photograph: Peter Murtagh

Louise and Niamh Doyle’s last Christmas together was a good one. They laughed and they joked, they ate and they drank. They snuggled up on Louise’s s(...)