The boat that Lynette and Brian Hooker were sailing up until she vanished off The Bahamas was seized by the US Coast Guard this weekend – while investigators sought a new key piece of evidence in the head-scratching case. The couple’s sailboat, the Soulmate, departed Marsh Harbour and sailed north to the waters between Jupiter, Florida, and Freeport in the Bahamas on Friday, the vessel tracking website Marine Traffic shows.   The Soulmate had previously been anchored in the harbor since Lynette’s disappearance under mysterious circumstances on April 4. But live tracking on the vessel stalled after the US Coast Guard reportedly took it into custody Saturday.  Lynette Hooker hasn’t been seen since she disappeared under mysterious circumstances in the waters off Elbow Cay, The Bahamas, on April 4.…