Portuguese cops fear that no trace of Madeleine McCann's will ever be found, as it is a possibility that the body was put in a weighted sack and dumped at sea, reported London's The Sun on Saturday.
Without a body, it will be hard to charge the parents with murder due to a lack of supporting evidence.
The article says that the sea theory is "one of the few police have left after four months of exhaustive land searches turned up nothing. Ocean specialists gauged where a body dumped off a beach would have been washed back ashore by tides." However, "a body weighed down with stones and dumped in deep water from a boat several miles out would simply disappear."
Madeleine's parents said they think the police in Portugal have forgotten about their daughter and that the investigation has become political. They are frustrated and feel as though the police are "playing a game with them."
In the article titled "Police 'cannot prove Madeleine's death'" in London's The Times, there was no mention of Madeleine's body being dumped into the sea.
"The forensic evidence which led to Kate and Gerry McCann being made official suspects in the disappearance of their daughter does not prove that Madeleine is dead, it was claimed [Friday]."
"Detectives have been struggling to create an accurate timeline of events after 6 p.m. on May 3, when Madeleine was taken by her parents to their holiday apartment to prepare her for bed." Kate McCann says she discovered Madeleine was missing after she made a check on the apartment at 10 p.m.
Traces of hair and bodily fluids were discovered in a Renault Scenic rented by the couple 25 days after Madeleineâ€™s disappearance and prove that her corpse had been in the trunk, reported the Times.
However, homicide could not be proven even if the DNA tests were a 100 precent match of Maddie's, said one officer. "The elements could only prove that the girl had been transported in the car."
Portuguese police are waiting for the test results of samples taken from the McCanns' apartment on their resort and rental car. "The results on the final samples will be added to 4,000 pages of evidence, including Kate McCannâ€™s diaries, which are being studied by a Portuguese judge."