Investigators said Regynald Jose Brown, 37, was reported missing November 20.
A caller who discovered Brown's body said it was in a trash can.
Detectives said they want to speak to anyone who saw anything suspicious in that immediate area during the past several weeks.
Those with information that might assist the investigation are asked to call Raleigh CrimeStoppers at (919) 834-HELP or to go to the CrimeStoppers Web site at www.raleighcrimestoppers.org for instructions on reporting a tip online or by text message. CrimeStoppers pays cash rewards for anonymous tips that help solve cases.