Rex Heuermann, the suspect in the Gilgo Beach serial killings, has been charged with the murder of a seventh woman, bringing the victim count to seven. The latest charge involves the long-unsolved case of Valerie Mack, whose death is now linked to Heuermann. Prosecutors have promised further significant developments in the investigation, which has captivated the public and raised questions around the timeline of events. As investigations continue, a major update is expected to be revealed soon.