College student 's battle for her life caught on 911 tape . Police did not respond to her call for help for 48 minutes . The murder weapon is described as a knife , two to five inches long . Comment: Police suspect she was attacked by a stranger and are eyeing vagrants .
College student 's battle for her life caught on 911 tape . Police did not respond to her call for help for 48 minutes . Comment: Police suspect she was attacked by a stranger and are eyeing vagrants .