(NEWSER) – Six officers in Philadelphia's Narcotics Field Unit were among the biggest crooks in the city over a six-year period in which they used violence and threats to steal more than $500,000 in cash and drugs, according to a federal indictment. The 26-count indictment against the six men, who were arrested at their homes yesterday, includes charges of robbery, extortion, kidnapping, and drug dealing, CNN reports. The officers have been under suspicion for years: Dozens of civil rights lawsuits against them are pending, and hundreds of cases they were involved in may now be dismissed. The feds were able to build a case against the men with the help of another former member of the unit who pleaded guilty to robbery and gun charges this year, sources tell the Philadelphia Inquirer.

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PHOTO: Philadelphia Police Department