(Reuters) -The U.S. Justice Department has opened a civil rights probe into the Louisiana State Police, department officials said on Thursday, more than three years after the deadly arrest of black motorist Ronald Greene in the state in 2019. The so-called pattern-or-practice investigation is the latest federal probe into potential systematic patterns of abuse at police departments and jails across the country. The Justice Department has also launched probes into Georgia state prisons, Texas juvenile detention facilities and police departments in Minneapolis and Louisville, among others. The d…