Who and Why

Two years back a murder happened and the case was closed because no clues could be found. After two years a murder happened again and in the same way just like the case two years ago. Emma, the detective in charge of the case could not find any clues either, it was impossible. Murders kept happening and they even recieved threatening letters, not only at the police station but even at Emma's house. Emma has a husband named Elios and even has a lovely daughter, Ember. Elios was a husband which everyone will dream of; he was everything a woman needed. After many years passed by and Emma still couldn't find the serial killer, the case was closed yet again. But... after the case was closed, Emma's husband went missing and they found him unconcious on a forest. But... when Elios was unconcious for ten days, Emma slowly started finding small clues about the serial murder. She slowly started joining the clues one by one without letting anyone know, not even the other detectives. Many things happened which even included Elios's sister, Ember and everyone around them. It was as if it was a warning from the killer. She slowly uncovered everything and the case was open again but this time their team weren't handling the case and the seniors were but... after some days, the case was handed over to their team again but... Emma knew something which she didn't want the others to know but they still found out about it and... the case was getting out of hand including Emma's private life.