[3] After briefly serving as an assistant United States Attorney, Gross became involved in the Bergen County Republican Party organization, then controlled by Walter H. Jones.

[6] Gross resigned from the GOP chairmanship in April 1970 and announced his candidacy for United States Senator, with the backing of Governor Cahill.

[7] Cahill's support helped him win the Republican primary, but he lost in the general election to the Democratic incumbent, Harrison A. Williams, by about 250,000 votes.

[10] After Gross was paroled in December 1977, he returned to Bergen County, managing a real estate business and operating the Binghamton Ferryboat, a restaurant converted from an old ferry moored off the shoreline of Edgewater, New Jersey.

He was a principal in the Jinep Corporation, which held the lease on a 12-acre (49,000 m2) waterfront lot in Edgewater, with tenants including a tennis club, a movie theater, a motel, a strip mall and an office building.

[11] Gross and his wife Noel maintained homes in Saddle River, New Jersey; Bridgehampton, New York; and Palm Beach, Florida.

[13] Three teenagers from Washington Heights, Manhattan, one of whom worked as a busboy at the Binghamton, were arrested for the robbery and murder of Gross, eventually pleading guilty to the crimes.

They admitted to abducting Gross at gunpoint, forcing him to drive to a bank to withdraw money, and then killing him in a secluded spot along the Henry Hudson Parkway.