Radford University student Luisa Cutting opened the door for police, covered in her roommate and “best friend” Alexa Cannon’s blood. ⠀⠀⠀⠀⠀⠀⠀⠀⠀ The 21-year-old college junior confessed to killing Alexa by stabbing her to death some 30-40 times. The two women were reportedly best friends since they met freshmen year. Police were called to the students’