Rex Heuermann, the suspected serial killer linked to the Gilgo Beach murders, has been formally charged with the murder of a seventh woman, Valerie Mack. This significant development comes after a lengthy investigation into the killings, which have drawn widespread attention. Authorities revealed that Mack, who disappeared in 2000, had ties to Philadelphia. The indictment against Heuermann raises the total number of victims he is accused of killing, as details surrounding the case continue to emerge. Legal representatives for Heuermann maintain his innocence, stating he will plead not guilty to the charges.