[JURIST] The US Department of Justice (DOJ) [official website] on Thursday announced its findings from a three-year investigation that the Puerto Rico Police Department (PRPD) [official website, in Spanish] has engaged in repeated unlawful and unconstitutional behavior [report materials]. The investigation, which began in June 2008, uncovered the PRPD use of excessive and unreasonable force, failure to protect First Amendment rights and unconstitutional stops, searches and arrests. In its executive summary report [PDF], the DOJ acknowledged that the rights violations…