The investigation into a missing wife who fell overboard in the Bahamas while sailing with her husband is now being treated as a murder probe, officials say. Lynette Hooker, 55, fell from a dinghy in rough conditions off the coast of Elbow Cay in the Abaco Islands on April 4, and her husband Brian Hooker, 58, said she vanished in the waters. In a dramatic update to the case on Tuesday, a US official told Fox News that the case was now being treated as a murder investigation. The US Coast Guard added that it was sending a dive team to search the waters where Lynette fell overboard, after GPS data pulled from Brian's phone allegedly showed that his movements contradicted his initial story to investigators.Brian claimed he had to paddle for several hours to get to a nearby island after his wife fell overboard, but investigators said they now believe they searched the 'wrong area' in the hunt for Lynette. It comes days after officials said investigators had also been authorized to search the couple's vessel, the Soulmate, which had been taken to Florida after the tragedy. Their boat was seized by the US Coast Guard at the outset of the case, and it is set to be scoured by investigators at a warehouse in Fort Lauderdale for any clues over her disappearance. 'Any sort of digital devices that you can take, any computer systems that you can extract, anything of that sort [will be taken in],' former FBI agent Nicole Parker told Fox News at the time. Lynette Hooker, 55, fell off a dinghy in rough waters while she and her husband, Brian Hooker, 58, were heading back to their sailboat, the Soulmate, on April 4 Their boat, which has since been taken to Fort Lauderdale, will be searched by authoritiesBrian has not been charged in the disappearance of his wife.'I've never harmed Lynette, and I never would harm Lynette, and I want to find Lynette,' he told NBC News in April.Brian's attorney Terrel Butler previously told the Daily Mail: ‘He categorically and unequivocally denies any wrongdoing.'The husband was initially detained by Bahamian officials for five days following his wife's disappearance, but he was released without charge and has since returned to the US. Parker said despite the case unfolding in the Bahamas, the FBI got involved in the investigation because the suspect and victim are both US citizens and their vessel was registered to the US, which she said 'gives the United States jurisdiction.'