Philadelphia — A teenage girl was found dead in an alley in West Philadelphia, and police believe the suspect is a man she met on Facebook. Detectives found the body of 15-year-old Sabriya McLean in the area of 49th and Spruce Streets after receiving a call around 11:40 a.m. on Tuesday. Police say she was stabbed more than 50 times and burned before her body was left covered in leaves. Police say Sabriya met the suspect on Facebook. Authorities say the suspect, identified as 23-year-old Cole Swaringer-Herring, told his parents, who reported the crime to police. Swaringer-Herring was arrested charged with murder, arson, abuse of corpse and related offenses. An investigation is ongoing.