Authorities have confirmed that the human head discovered on a Key Biscayne beach belongs to 19-year-old Victor Enrique Castaneda Jr., the swimmer who went missing off South Pointe Drive over the weekend. After the swimmer was reported missing around 6 p.m., Saturday, a large-scale, three-hour search was conducted by Miami Beach Fire Rescue and Police, along with the U.S. Coast Guard and Miami-Dade Fire Rescue. Despite the extensive search, the swimmer was not found, and the case was entered into the missing persons database. On Tuesday, a human head was discovered behind Ocean Sound Key Colony, located at 251 Crandon Blvd. in Key Biscayne. Miami Beach Police were notified by Miami-Dade Police, and an investigation was immediately launched. “The Miami Beach Police Department extends prayers and condolences to the family,” police said in a statement. “Our victim advocates will continue to provide support to the family during this time.” The Miami-Dade Medical Examiner confirmed on Friday that the remains belonged to Castaneda. Please check back on WSVN.com and 7News for more details on this developing story.