The Federal Bureau of Investigation has confirmed that the human remains found at a North Port, Florida environmental park on Wednesday belong to 23-year-old Brian Laundrie. The FBI’s Denver Division wrote in a press release on Thursday that medical examiners used a comparison of dental records to positively identify the remains.

A North Port, FL police spokesperson earlier had confirmed that partial human remains recovered at the Myakkahatchee Creek Environmental Park where Laundrie was last believed to have been a day ago were described as “skeletal.” Two senior law enforcement officials also revealed that the human remains discovered yesterday at the Carlton Reserve during the search for Laundrie include a portion of a human skull.

The latest development Thursday comes after Steven Bertolino, attorney for the Laundrie family, said the remains found at Myakkahatchee Creek Environmental Park by parents Chris and Roberta the morning prior were likely those of the missing 23-year-old. The FBI field office in Tampa confirmed the basic findings at a news conference Wednesday. In addition to the human remains, the FBI said investigators found a backpack and a notebook believed to belong to Laundrie near a path at the Myakkahatchee Creek Environmental Park. The agency revealed that the items were underwater up until recently, and were only found now that the water had receded.

Officials said that the FBI teams will likely be on scene processing potential evidence for several days and the park will remain closed to the public until further notice.