Jackson County prosecutors filed charges Monday morning against an Odessa man for the March 1989 murder and rape of a 20-year-old woman.  Guy Shannon Jr., 44, has been charged with first-degree murder and forcible rape in the strangulation death of Marcia Davis.  Shannon allegedly left Davis’ body in a vacant apartment in Kansas City, according to court documents.  Investigators received a hit on DNA matching Shannon after his felony conviction in 2010 for driving while intoxicated.  Bond was set at $350,000.