Coast Guard ends search for man who vanished after boat crash off Key Biscayne Published: Updated: Tags: The U.S. Coast Guard announced Thursday evening that the search for a 33-year-old man who vanished after a Jan. 4 boat crash off Key Biscayne has ended. Florida Fish and Wildlife reported divers found human remains belonging to the man identified as Spencer Sheridan, according to the Coast Guard. “Our sincere condolences go out to the family and friends who lost their loved one,” Capt. Jo-Ann F. Burdian, the commander for the U.S. Coast Guard Sector Miami, said in a statement adding he had “truly hoped for a different outcome to this tragic situation.”