The smell of the rotting body made the neighbors uncomfortable so they called 911. You are first to arrive at the scene and find a man’s body rotting in the basement. Near the body, there are blood smears and a bloody footprint. A broken glass is also found at the crime scene and there are a few hairs which look like cat hairs. There is blood on the clothes of the victim which is not completely dry and he is holding a knife. The chair is upside down and the window is open. Please help me to procedure the follow the seven’s s of the crime scene investigators