Facebook fears after sex offender logged on to murder?

Questions were last night raised about the monitoring of the online activity of sex offenders after it emerged that a convicted rapist was able to use the social networking site Facebook to befriend a vulnerable teenager he then raped and murdered.

Peter Chapman, 33, was pretending he was 19 years old when he convinced student Ashleigh Hall, 17, to be his Facebook friend. Chapman, who had previously received a seven-year prison sentence for raping two prostitutes, collected the girl in his car from her house before driving to a lay-by where he tied her up, raped and strangled her.