BRANSON, Missouri, July 21, 2018 (News Wires) - More than half of the 17 people killed when a tourist boat sank on a Branson lake were members of the same Indiana family, and they likely wouldn't have been on the ill-fated trip but for a ticket mix-up. Tracy Beck, of Kansas City, Missouri, said she recalled the family members waiting in line. After they stopped for a picture, she said, a ticket taker realized they should have boarded at a different location and reassigned them. The grief-stricken community, known for its country shows and entertainment, hosted two vigils Friday night. About 300 people gathered in the parking lot of Ride the Ducks of Branson and others mourned at a church, singing "Amazing Grace" at both locations. At the rally at the duck boat business, the Rev. Zachary Klein said he had no words of comfort to offer the families of victims "because there simply are no words to comfort them." Divers found the final four bodies Friday in Table Rock Lake near Branson after the deadliest accident of its kind in nearly two decades. State and federal investigators were trying to determine what went sent the vessel known as a duck boat to its demise. An initial assessment blamed thunderstorms and winds that approached hurricane strength, but it wasn't clear why the amphibious vehicle even ventured out into the water. Mayor Karen Best said Branson is typically a city "full of smiles ... But today we are grieving and crying."