In a case involving a man accused of killing his neighbor in Chicago, the high court justices wrote in their January ruling that in the last 25 years, "we not only have seen that eyewitness identifications are not always as reliable as they appear, but we also have learned, from a scientific standpoint, why this is often the case. ... Today we are able to recognize that such research is well settled, well supported, and in appropriate cases a perfectly proper subject for expert testimony."