The government summed up its racketeering conspiracy case against John Gotti, reputed leader of the Gambino crime family, in U.S. District Court in Brooklyn. Assistant U.S. Atty. Diane Giacalone said Gotti's business is crime and it is ruled by secrecy, fierce loyalty and threats of death. The case against Gotti was expected to go to the jury after four days of summations. Gotti and six others are accused of running illegal rackets involving murder, truck hijacking, loan sharking and cigarette smuggling over an 18 year period. If convicted each faces up to 40 years in prison.