Undated photos, from top left to right, show Philadelphia Police officers Thomas Liciardello, Perry Betts, Linwood Norman and from bottom left to right, Brian Reynolds, John Speiser and Michael Spicer. (Philadelphia Police Department )

Six members of an elite Philadelphia narcotics squad were acquitted Thursday of federal corruption charges.

A jury of six men and six women found Officers Thomas Liciardello, Brian Reynolds, Michael Spicer, Perry Betts, Linwood Norman and John Speiser not guilty of charges they beat and robbed drug suspects during their time as members of the Police Department's Narcotics Field Unit.

Each of the officers had faced one count of racketeering conspiracy. All but Reynolds and Speiser had also been charged with conspiring to violate the civil rights of drug defendants, among other charges.

In six weeks of testimony, government witnesses repeatedly said the squad conducted their duties like street thugs. They accused the officers of employing ganglike tactics like roughing up drug suspects, ignoring due process, planting evidence, pocketing seized money and lying on official police reports to cover up their crimes.