Behind the barbed wire at the Nassau County Jail, Barber works as a grievance officer, fielding complaints from female inmates about life behind these walls.
Prosecutors say Barber preyed on at least six of them over two years, extorting sex favors. In return, he allegedly provided special treatment, like cigarettes or extra time on the phone.
"There were at times statements made by this defendant along the lines of 'I can make your life miserable here.' And that is true," Rice said. "For a jail staff member to use his leverage to sexually abuse inmates is despicable."
Barber joined Nassau's Corrections Department in 1987 and he was president of the officers' union for awhile.
Back in 1999, after a series of excessive force allegations against his co-workers, he told Eyewitness News to take them with a grain of salt.
No one came to the door at his Levittown home, where Barber lives with his mother and brother.
After his arraignment, his union lawyer said the allegations are completely false.
"Absolutely not, we deny all of the charges outright," he said.
Barber, 47, faces up to 16 years in prison if convicted. He is due back in court January 4.