( CNN ) -- Authorities have wrapped up their search at the home that once belonged to New York gangster James `` Jimmy the Gent '' Burke after finding material that `` may be human remains '' under the floor , a law enforcement source with knowledge of an investigation at the home said Thursday . Investigators at Ozone Park in Queens finished the search Wednesday night for human remains possibly connected to a case that happened before 1996 , said the source , who spoke on condition of anonymity . It will be a few days before the FBI learns from forensic testing by the medical examiner 's office if the remains are human , the source said . According to public records , the house is now owned by Burke 's daughter , Catherine Burke , who declined Tuesday to comment to CNN . James Burke died in 1996 . According to his obituary in the New York Times , he was serving a 20-years-to-life sentence in a New York prison when he fell ill with cancer . Robert De Niro played Burke as Jimmy Conway in the 1990 Martin Scorsese classic mafia film `` Goodfellas , '' and Burke is likely best known as the alleged mastermind of the 1978 Lufthansa heist , an $ 8 million robbery at John F. Kennedy International Airport , which was the largest robbery in history at the time . But the source said that Burke and his cohorts , closely associated with top members of the Lucchese crime family , also were allegedly involved in a number of other activities -- so the search in Queens may not be related to the Lufthansa heist . Jim Margolin , a spokesman for the FBI 's New York office , told CNN on Tuesday , without elaborating , that investigators were `` conducting a search at a home in Queens in connection to an investigation . ''
FBI : The FBI is awaiting forensic test results to determine if the bodies are human . Police searched the home of former Congressman and ` ` Jimmy the Man '' Burke . The search was connected to a murder the occurred before 1996 , the source says .