A city officer was sentenced to five years in prison in 1998 for being on the payroll of a drug lord and for helping abduct and kill a rival narcotics dealer. The drug lord was spared execution but was sentenced to life in federal prison, linked by prosecutors to more than a dozen murders and described as one of the most ruthless drug dealers in Baltimore at the time.

1999: Latino harassment

A police officer pleaded guilty in July 1999 to using his badge to rob a Latino immigrant in Fells Point under the ruse of checking immigration papers. The case strained relations with the community as more immigrants accused officers of robbing them. Only one officer was charged and convicted in connection with one robbery.

2000: Planting drugs

A police officer in 2000 was caught in an undercover sting and charged with planting drugs on an innocent man, raising questions about police tactics across the department. The case crumbled with prosecutors accusing police of bungling the investigation and charges were dropped. The accused officer later committed suicide.

2004: Former commissioner guilty

Former Baltimore Police Commissioner Edward T. Norris pleaded guilty in 2004 to public corruption and tax charges for misusing a special police fund and served six months behind bars. His top aide also pleaded guilty in the case and admitted to using money from the fund to pay for romantic liaisons, dinners at expensive restaurants, trips and gifts.

2005: Flex squad allegations

Police commanders in 2005 disbanded the Southwestern District's "Flex Squad" after an officer was charged with raping a woman in the police station. Detectives reported finding drugs haphazardly kept in desk drawers and evidence that members had been planting contraband on suspects. A jury acquitted the officer of rape and the department dropped administrative charges against other officers. Nothing ever came of the broader investigation into the squad.

2006: Drug shakedown