Two former Baltimore police officers were found guilty on racketeering charges in one of the largest police corruption cases in history.

On Monday, Daniel Hersl and Marcus Taylor, former detectives of the department’s Gun Trace Task Force, were found guilty by a federal jury for racketeering, conspiracy and robbery, according to CBS Baltimore. They were found not guilty of using a firearm in the commission of a crime.

Federal prosecutors alleged that Hersl, Taylor and other officers were robbing drug dealers, dealing drugs and then covering up their crimes.

“The people that they were robbing had no recourse,” said acting U.S. attorney Stephen Schenning. “They thought if you robbed drug dealers they have no place to go.”

Darryl DeSousa, Police Commissioner-Designate for the Baltimore police department, said in a statement that the police force has “zero tolerance for corruption.”

Hersl and Taylor pleaded not guilty and are now facing 60 years in prison. Six officers, who testified for the prosecution, entered guilty pleas and are facing up to 20 years in prison.

Hersl and Tayor were both fired from the police department following the verdict, according to NBC News.