Investigators say evidence has led them to believe that it was a drug overdose, however there will be an official autopsy later this week.
Carter was declared missing nearly two weeks ago.
There haven't been arrests made in connection with Carter's death.
Police say the main goal was to find Carter and provide closure to his family.
Lieutenant Wilson of Wellsville police said he will have to decide with the prosecutor how to proceed. Wilson said any arrests or charges will be handled at a later date.