UMass Amherst senior and Congressional intern Eric Tarpinian-Jachym, who was killed in a Washington, D.C. triple shooting, is remembered by U.S. Rep. Ron Estes for his kind heart and cheerful smile.

For nearly four hours in June, Eric W. Johnson insisted to Prince George's County police detectives that the two armed robbery victims who had identified him as a culprit were wrong, that he was ...