The U.S. Coast Guard recently determined the cause of a 2009 collision that led to the death of 8-year-old Anthony DeWeese. The U.S. Coast Guard recently determined the cause of a 2009 collision that led to the death of 8-year-old Anthony DeWeese. The U.S. Coast Guard recently determined the cause of a 2009 collision that led to the death of 8-year-old Anthony DeWeese.