Kansas City police have identified the man who was shot and killed in a home invasion on Thursday.  Aaron Markarian, 23, was a music student at the University of Missouri-Kansas City, according to school officials.  Markarian was among eight people who were at the home near 49th and Brookside when two men stormed in and opened fire around 11:30 p.m.  Three others were wounded.  Their injuries are believed to be non-life-threatening.