The San Diego Police Department is the latest law enforcement agency that has come under scrutiny of federal officials.

The US attorney's office and FBI have announced they'll be launching a criminal investigation into alleged incidents of officer misconduct, and the Department of Justice will be reviewing additional cases as well.

The SDPD was launched into the national spotlight several years ago when now former officer Anthony Arevalos  was convicted on charges relating to trading sexual favors during traffic stops in exchange for turning a blind eye to DUI and other vehicle code violations.

A second round of allegations came last month, after another officer was brought up on charges for a similar offense.

Since that time, Police Chief Bill Landsowne has stepped down and he's been replaced by Assistant Chief Shelley Zimmerman.  The SDPD reportedly said the federal probe will last between 6 and 8 months and will leave no stone unturned.

Chicago, Southhampton police departments also probed

In December of 2012, the US Justice Department started an investigation within the Chicago PD after rumors of improper interrogation practices began to swirl.

At that point, several convicted inmates came forward saying officers spoon-fed them what they were to say in their confession and told them as long as they signed the document, they'd be free to go.

All of the men denied having any involvement in the crime they were accused of.  They have since been cleared using DNA evidence.

The Southampton PD also came under federal scrutiny in 2012 after it was learned that Street Crime unit officers were keeping bags of drugs in an unsecured location within their office.

At that point, one officer admitted to having an addition to prescription painkillers and that his supervisors were not only aware of the problem, but they allowed him to remain on the job.