Since disappearing from her parents' hotel room in Praia da Luz, Portugal, in 2007, many have been searching for answers regarding Madeleine McCann's whereabouts. For years, her parents, Kate and Gerry McCann, have worked alongside police as they have attempted to follow leads in order to learn new details that could solve the case.

In recent weeks, Christian Brückner has been publicly identified as a new prime suspect, but reports have indicated that "Christian B," as he is commonly called, was on law enforcement's radar long before others were alerted to his possible connection to the crime. It has now been said that "blundering German police" may have let Brückner know back in 2013 that he was being looked at in regards to the McCann case, which, in turn, allowed him to potentially destroy evidence. 

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According to the Daily Mail, a Spiegel Online report indicated that the federal criminal police (BKA) had asked Brunswick for additional information about the suspect after confidentially receiving a tip in October 2013. 

However, when calling Brückner in to discuss the matter, it has been reported that officials specifically stated that it was regarding the "Madeleine McCann missing persons case" and "personal examination of Christian B." In turn, it has been said that he had "ample time to destroy any evidence." 

As a result, the move has since been called a "serious mistake" in the investigation as an experienced officer stated that such a thing should have never occurred. 

Prior to the new allegation, other reports have also brought a new perspective to the "unsolvable" 2007 case. After considering that another criminal may have been responsible for McCann's abduction, it was also stated that Brückner himself may have been tipped off by a "crooked hotel worker" leading up to her disappearance. Additionally, some believe that unexpected people could have "concrete knowledge" that could help solve the case. 

At this time, "Christian B" has not been called in for additional questioning pertaining to McCann's disappearance due to the fact that such an interrogation would only occur once an investigation has reached a conclusion. It has also been said that Brückner has not officially been charged yet because in Germany "a murder case can only be opened if the amount of evidence would likely lead to a conviction over an acquittal."

Madeleine McCann Madeleine McCann disappeared on holiday in Praia da Luz, Portugal, on May 3, 2007. Photo: METROPOLITAN POLICE/Handout