Federal authorities announced the arrest of 10 metro law enforcement officers Tuesday on charges of arranging protection for a street gang’s drug deals.

“Obviously the breadth of the corruption is very troubling,” said U.S. Attorney Sally Yates . “It is certainly the most (officers) this office has charged in a long time.”

The case began as a street gang investigation by the federal bureau of Alcohol, Tobacco, Firearms and Explosives, whose undercover agents learned that gangs had officers on the payroll for protection, Yates said. The FBI took command of the public corruption aspects of the case.

At least one officer recommended that the gang use a school parking lot to exchange drugs for cash because trading backpacks there would not look suspicious, Yates said at a 2 p.m. news conference.

The law enforcement officers arrested today were: Atlanta Police Department Officer Kelvin Allen, 42, of Atlanta; DeKalb County Police Department Officers Dennis Duren, 32, of Atlanta and Dorian Williams, 25, of Stone Mountain, Georgia; Forest Park Police Department Sergeants Victor Middlebrook, 44, of Jonesboro, Georgia and Andrew Monroe, 57, of Riverdale, Georgia; MARTA Police Department Officer Marquez Holmes, 45, of Jonesboro, Georgia; Stone Mountain Police Department Officer Denoris Carter, 42, of Lithonia, Georgia, and contract Federal Protective Services Officer Sharon Peters, 43, of Lithonia, Georgia. Agents also arrested two former law enforcement officers: former DeKalb County Sheriff’s Office jail officers Monyette McLaurin, 37, of Atlanta, and Chase Valentine, 44, of Covington, Georgia.

Civilians arrested today were: Shannon Bass, 38, of Atlanta; Elizabeth Coss, 35, of Atlanta; Gregory Lee Harvey, 26, of Stone Mountain, Georgia; Alexander B. Hill, 22, of Ellenwood, Georgia; and Jerry B. Mannery, Jr., 38, of Tucker, Georgia.

Some of the officers were retired and some were active duty. The highest rank was sergeant and the payoffs ranged as high as $7,000 per transaction. Each transaction involved at least five kilograms of cocaine, which carries a 10 year minimum sentence, Yates said.

Officers were involved in multiple transactions, provided escorts to dealers and buyers and offered to provided muscle if necessary to protect their clients, Yates said.

Yates said the investigation is ongoing and declined to say whether more officers would be arrested.

ATF Special Agent in Charge Scott Sweetow would not name the street gang involved but he suggested the public corruption aspects would be more far-ranging.

“I can say this is probably not the last you will be hearing of this case,” he said.

A press release from Yates’ office detailed the following allegations:

DeKalb County Police Department

Between October 2011 and November 2011, DeKalb County Police Officer Dennis Duren, working together with Bass, provided protection for what he and Bass believed were four separate transactions in the Atlanta area that involved multiple kilograms of cocaine. Duren and Bass accepted cash payments totaling $8,800 for these services. During the transactions, Duren was dressed in his DeKalb County Police uniform and carried a gun in a holster on his belt, as he patrolled on foot in the parking lots in which the undercover sales took place. After the first two transactions, Duren allegedly offered to drive his patrol vehicle to future transactions for an additional $800 fee, and afterward received an additional $800 in cash for using his patrol vehicle in the final transaction in November 2011. Duren and Bass are each charged with conspiring to commit extortion by accepting bribe payments and attempted possession with intent to distribute more than five kilograms of cocaine. Duren also is charged with possessing a firearm in furtherance of a drug trafficking crime.

Between January and February 2013, DeKalb County Police Officer Dorian Williams, working together with Mannery and Bass, provided protection for what he and Mannery believed were three separate transactions in the Atlanta area that involved multiple kilograms of cocaine. Williams and Mannery accepted cash payments totaling $18,000 for these services. During the transactions, Williams was dressed in his DeKalb County Police uniform and carried a gun in a holster on his belt, and he patrolled the parking lots in which the undercover sales took place in his DeKalb Police vehicle. During a meeting between the three transactions, Williams allegedly instructed Bass to remove any cocaine from the scene if Williams had to shoot someone during the upcoming sale. In another meeting, Williams suggested that future drug transactions should take place in the parking lot of a local high school during the afternoon, so that the exchange of backpacks containing drugs and money would not look suspicious. Williams and Mannery are each charged with conspiring to commit extortion by accepting bribe payments and attempted possession with intent to distribute more than five kilograms of cocaine.

Stone Mountain Police Department

Between April and September 2012, Stone Mountain Police Officer Denoris Carter, working together with Mannery, provided protection for what he and Mannery believed were five separate transactions in the Atlanta area that involved multiple kilograms of cocaine. For these services, Carter and Mannery accepted cash payments totaling $23,500. For all five transactions, Carter dressed in his Stone Mountain Police uniform. In four of the deals, he arrived in his police cruiser and either patrolled or parked in the parking lots in which the undercover sales took place and watched the transactions. During the final transaction in September 2012, Carter was on foot, displaying a firearm in a holster on his belt, and he walked through the parking lot in which the transaction took place and watched the participants. Finally, during one of the transactions, Carter agreed to escort the purchaser of the sham cocaine in his police vehicle for several miles, until the purchaser reached Highway 78. Carter is charged with conspiring to commit extortion by accepting bribe payments, attempted possession with intent to distribute more than five kilograms of cocaine, and possessing a firearm in furtherance of a drug trafficking crime.

Atlanta Police Department

Between June and August 2012, Atlanta Police officer Kelvin D. Allen, working together with Coss, provided protection for what he and Coss believed were three separate transactions in the Atlanta area that involved multiple kilograms of cocaine. Allen and Coss accepted cash payments totaling $10,500 for their services. For two transactions, Allen dressed in his Atlanta Police uniform and carried a gun in a holster on his belt. Allen patrolled on foot in parking lots in which the undercover sales took place and appeared to be monitoring the transactions. During a meeting after the three transactions, a cooperator gave Allen and Coss each a $1,000 bonus payment in return for protecting the three transactions. Allen and Coss are each charged with conspiring to commit extortion by accepting bribe payments and attempted possession with intent to distribute more than five kilograms of cocaine. Allen also is charged with possessing a firearm in furtherance of a drug trafficking crime.

MARTA Police Department

Between August and November 2012, MARTA Police Department Officer Marquez Holmes, working together with Coss, provided protection for what he and Coss believed were four separate transactions in the Atlanta area that involved multiple kilograms of cocaine. For these services, Holmes and Coss accepted cash payments totaling $9,000. During the transactions, Holmes was dressed in his MARTA Police uniform and carried a gun in a holster on his belt. In two of the transactions, Holmes patrolled on foot in the parking lots in which the undercover sales took place and monitored the transactions. During the other two deals, Holmes drove to the site in his MARTA police cruiser and parked next to the vehicles in which the undercover drug sale took place. Holmes is charged with conspiring to commit extortion by accepting bribe payments, attempted possession with intent to distribute more than five kilograms of cocaine, and possessing a firearm in furtherance of a drug trafficking crime.

Forest Park Police Department

Between October to December 2012, Forest Park Police Sergeants Victor Middlebrook and Andrew Monroe, sometimes working alone and at other times together, provided protection for what they believed were six separate drug deals in the Atlanta area, all involving multiple kilograms of cocaine. For his services in the first four transactions, Middlebook accepted cash payments totaling $13,800. During these transactions, Middlebrook wore plain clothes, but displayed his badge and a firearm in a holster on his belt. He patrolled on foot in the parking lots nearby the vehicles in which the undercover sales took place and appeared to be monitoring the transactions. For the final two transactions, both Middlebrook and Monroe provided security and were given cash payments totaling $10,400. Middlebrook again monitored the transactions on foot in plain clothes while displaying his badge and gun, while Monroe watched from his vehicle in the parking lot and afterward escorted the purchaser of the sham cocaine for several miles. Middlebrook and Monroe are charged with conspiring to commit extortion by accepting bribe payments and attempted possession with intent to distribute more than five kilograms of cocaine; Middlebrook is also charged with possession of a firearm in furtherance of a drug trafficking crime.

DeKalb County Sheriff’s Office

In January 2013, former DeKalb County Sheriff Jail Officer Monyette McLaurin, working together with Harvey, provided protection for what they believed were two separate drug transactions in the Atlanta area that involved multiple kilograms of cocaine. Harvey already had provided security for two undercover drug transactions in December 2012, falsely representing that he was a DeKalb County detention officer and wearing a black shirt with the letters “SHERIFF” printed across the back during the transactions. Harvey then stated that he knew other police officers who wanted to protect drug deals, and in January 2013 he introduced McLaurin as one of these officers. During a meeting to discuss future drug transactions, McLaurin falsely represented that he was a deputy employed by the DeKalb Sheriff’s office, even though his position as a jail officer ended in 2011. McLaurin and Harvey further stated during this meeting that they may need to kill another person who knew that Harvey had protected drug deals, if this person reported the activity to others.

During the two transactions in January 2013, McLaurin was dressed in a DeKalb County Sheriff’s Office uniform with a badge, and he carried a gun in a holster on his belt. He accompanied the undercover seller of the cocaine to pick up the drugs from a warehouse, counted the kilograms the seller received, and stood outside the purchaser’s vehicle during the actual transaction. He further discussed with the seller whether they should agree upon a signal for the seller to indicate that the sale had gone awry, requiring McLaurin to shoot the drug buyer. For their services, McLaurin and Harvey were paid $12,000 in cash. McLaurin and Harvey are each charged with attempted possession with intent to distribute more than five kilograms of cocaine and with possessing a firearm in furtherance of a drug trafficking crime.

Later in January 2013, McLaurin and Harvey introduced a second former DeKalb County Sheriff’s Jail Officer, Chase Valentine, to help provide security for future drug deals. Like McLaurin, Valentine falsely represented himself to be a DeKalb County Sheriff’s Deputy, even though his position as a jail officer ended in 2010. Together with Harvey, Valentine provided security for one undercover drug transaction on January 17, 2013, during which he wore a DeKalb Sheriff’s Office uniform and a pistol in a holster on his belt. During the transaction, Valentine escorted the seller to pick up the sham cocaine, counted the number of kilograms delivered, and stood outside the purchaser’s car during the actual transaction. For these services, Valentine received $6,000 in cash. Valentine is charged with attempted possession with intent to distribute more than 500 grams of cocaine and possession of a firearm in furtherance of a drug trafficking crime.

Federal Protective Services

In November 2012, Sharon Peters, who was a contract officer for the Federal Protective Services, worked together with Mannery to provide protection for what they believed were two separate transactions in the Atlanta area that involved multiple kilograms of cocaine. For these services, Peters and Mannery accepted cash payments totaling $14,000. For both transactions, Peters parked her vehicle nearby the cars where the sham drugs and money were exchanged, and watched the transactions. Before both transactions, Peters told others that she had her pistol with her in the car. Peters is charged with attempted possession with intent to distribute more than five kilograms of cocaine, and possession of a firearm in furtherance of a drug trafficking crime.

Imposter Clayton County Police Officer

Between December 2012 and January 2013, Alexander B. Hill falsely represented himself to be an officer with the Clayton County Police Department while providing security for what he believed were three separate drug transactions in the Atlanta area that involved multiple kilograms of cocaine. During an initial meeting, Hill wore a uniform that appeared to be from Clayton Police, but during the transactions he wore plain clothes and, for at least the first deal, a badge displayed on his belt. For these services, Hill received payments totaling $9,000 in cash. Hill charged with attempted possession with intent to distribute more than five kilograms of cocaine and with possession of a firearm in furtherance of a drug trafficking crime.