By Rich McKay and Steve Gorman (Reuters) – A criminology graduate student from Washington State University has been arrested in Pennsylvania and charged with first-degree murder in the stabbing deaths of four University of Idaho students more than six weeks ago, authorities said on Friday. Police acting on a fugitive arrest warrant took Bryan Christopher Kohberger, 28, into custody on Thursday night, according to James Fry, chief of police in Moscow, Idaho, where the University of Idaho campus is located. Fry said Kohberger has a home in Pennsylvania. Kohberger was arraigned in eastern Pennsyl…