Renato Seabra (say-AH'-brah) pleaded not guilty Tuesday to a second-degree murder charge.
Police say the 21-year-old has confessed to killing well-known Portuguese journalist Carlos Castro on Jan. 7 at their hotel room in Manhattan.
They say Seabra brutally attacked his companion for at least an hour.
Proescutors says Seabra admitted to castrating Castro with a corkscrew, bludgeoning him with a computer monitor and stabbing him in the face.
Defense lawyer David Touger said after Seabra's court hearing that they hope for a positive outcome to the case, although he didn't elaborate.
Seabra remains in custody at Bellevue Hospital.