US Federal authorities have escalated the investigation into the disappearance of Lynette Hooker to a homicide probe after uncovering new forensic data.The inquiry follows the arrival of a US Coast Guard dive team in the Bahamas to search waters near the Abaco Islands.Investigators are currently scrutinizing digital GPS evidence that reportedly contradicts statements provided by the husband, Brian Hooker.Brian Hooker was previously detained by local police but was released without charges while he maintains his innocence regarding the incident.