The officer assigned to it more than three hours later visited the house but left after getting no response and failing to realise the suicide risk as he had not read the log properly.
Under Facebook's policy, no-one under 13 is allowed to be a member but lawyers for her father claim its open registration system allows children to log-in and that could put them at risk from paedophiles.
In court on Wednesday, a lawyer for the girl's father claimed Facebook's open registration system allowed children to log-in and warned that it could put them at risk from paedophiles.