It has been nearly five months since Karen Montenegro's only daughter, who had just completed her junior year at Arizona State University, was dragged to her death following a brazen purse snatching in Tempe, Ariz., on May 26, and no one has been charged with the murder.

Last Sunday, another ASU student was murdered, shot to death during a robbery attempt while walking from the library to his apartment. Honors student, Zachary Marco, 21, of Mesa, Ariz., was killed by two men who stole his laptop computer and cell phone.