Three of the officers were demoted he said.
The investigation was launched under previous Chief Micheal T. Williams after officials found discrepancies in 7 police reports.
The probe expanded to include all 5 precincts in the department, where investigators found 85 reports in Precinct one had been altered or completely falsified.
Barber said misconduct was not a result of pressure from top brass, rather a systematic problem to conceal evidence of crime in one precinct.
"There's no pressure applied to change any reports, I'll assure you that, the accountability process is that you're accountable for crime so that you know what's happening," Barber said, "[It's] pretty telling of an environment that allows that to happen."
Precinct Capt. Eddie Patrick was at the helm, Barber said. Patrick was demoted to Lieutenant and reassigned to another non-operational role. Sergeant Joe Wolfe was bumped to Corporal and Corporal Damian Colvin to a patrolman. Officer Scott Davis will simply serve a suspension.
The men were found guilty during disciplinary hearings which concluded Monday, Barber said.
Patrick was not accused of actually falsifying records, but not preventing it to permeate in the unit, the chief said.
Wolfe, Colvin and Davis were found guilty of making false entries.
All four will begin suspensions at various times, but will be able to appeal the decisions to the Mobile County Personnel Board.
Another detective resigned during the investigation, Williams previously said in October.
In some of the cases, Barber said, victims who reported crimes told internal investigators they never spoke to a detective, however, statements supposedly taken from those victims appeared in reports.
"I can't even put words for you how disappointed I am to have to stand here and discuss the internal matters of the police department," Barber said, "It's a very distracting thing for me to have to deal with at a time when I'm trying to move the department in a different direction."
It's the second time in as many days Barber addressed reporters concerning alleged misconduct by officers.
On Wednesday, Barber confirmed Third Precinct Captain Carla Longmire and Officer Bradley Latham were accused of having sex while on duty.
Longmire is charged with unbecoming conduct and failure to supervise. Latham is charged with unbecoming conduct, untruthfulness during an investigation and disobedience of orders.
Barber said the charges against Longmire and Latham will be reviewed during a disciplinary hearing December 16.
Chief Barber says the initial complaint came from a supervisor at the precinct two months ago.
Lt. Roy Hodge will serve as acting Captain in Precinct 1, Barber added.
