The footage, released by Waddell's family this week, captures the Cary, North Carolina, resident walking from her Airbnb toward the water around midday on July 22. Authorities say there is no footage showing her returning to shore, making it the last confirmed visual evidence of her movements. The surveillance footage shows Waddell entering relatively shallow water at approximately 11:47 a.m. and swimming offshore. Authorities are also reviewing additional hotel and business surveillance footage and interviewing potential witnesses in an effort to account for Waddell's movements after she disappeared from the beach camera's view. Family appeals for answersWaddell's husband, Cailen Waddell, traveled to Grenada to assist with the search after learning she had disappeared.