Who killed Austin ?..

bella ran to lily's house crying "lily ,lily " her voice sounded scared and desperate to talk to someone .I open the door and found bella in a beautiful dress but wait!! it was torn her makeup was smudged she shivered and pushed lily and went inside the house ,and screamed at lily to close the door l banged the door shut and looks at bella she asked her to take a hot shower and changed her clothes for which lily handed some of her clothes to bella . Bella had taken the shower and was scared she hadn't spoken a word till then ,i asked bella" what had happened and why are was she so quit " No answer came Suddenly bella hugged me and started crying (what had happen to bella why was she in torn clothes??) I thought but I knew that this was not the right time to ask her Suddenly Bella made noises as if she was being choked by someone I gave her water but she was just not able to drink the water she screamed I want to tell something and then she fell on the floor I called the ambulance and my parents they all came but just too late bella had gone it felt like a nightmare i had just lost my best friend ......