The U.S. Department of Justice announced the results of a 20-month investigation of the Cleveland Police Department’s use of excessive force. The agency launched the probe in March 2013 after several highly publicized incidents of violence against African Americans, including the 2012 police chase and shooting that ended in the deaths of two unarmed citizens.

Here are links to the Department of Justice’s reports on the investigation:
Case Summary
Executive Summary of Findings Letter (2014, English)
Executive Summary of Findings Letter (2014, Spanish)
Findings Letter (2014)
Statement of Principles (2014)