One Man's Horror Is Another Man's Happiness

A girl comes home to her mother and father dead, they were blogging about a jewel and that's what got them killed. The killer is a man who only looks for money and when he finds valuables being blogged about on internet he goes and kills the people who have the valuable and use it for money. He chose Pandora's parents and that's how Sherlock meets the girl he starts to strangely like <3