The parents of Madeleine McCann are being investigated for possibly neglecting their daughter on the night she disappeared from their Portuguese vacation apartment, it has been revealed.

The first published court ruling on the Madeleine case confirms that the police inquiry covers homicide, abandonment, concealment of a corpse and abduction.

The reference to “abandonment” suggests that Portuguese detectives are investigating if there is evidence that Kate and Gerry McCann were negligent in leaving their daughter alone on the night she was reported missing. The charge carries a maximum 10-year jail sentence.

The McCanns, both doctors, have strenuously denied negligence and said they were just 50 yards away when their daughter was taken.

The court ruling also reveals that the public prosecutor wants access to the content of text, audio and video messages from 10 cell phones believed to belong to Kate and Gerry McCann and seven of their British friends.

Investigators are particularly interested in the content of 18 text messages allegedly sent from an unidentified number to Gerry McCann between May 2 and 4, 2007. They also want details of all calls made between members of the group between 8 p.m. on May 3 and noon the following day.

Madeleine was reported missing at 10 p.m. on May 3 from her bedroom at the Ocean Club resort in Praia da Luz. Her parents and their friends had been dining at a restaurant while Madeleine and her twin 18-month-old siblings were asleep.

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