Pools of blood ...sticky sweet
You don't realize that some victims are real bleeders. Hacking away at a body causes a massive mess. Always carry a lot of garbage bags and duct tape. You learn to rip the duct tape with their teeth...that way their saliva and DNA is on the tape and not yours. Sprinkle hair samples that you retrieved from barber shop dumpsters over the body in order to throw off the investigators... just in case your body makes an unwanted appearance.