A state appeals panel affirmed a $1.5 million award given to the estate of a man who was killed in a Cabrini-Green elevator shaft. In July 2009, Clarence Walker was attempting to gain access to a broken elevator at 365 W. Oak St. from the third floor. The building, since-demolished, was owned by the Chicago Housing Authority and managed by It’s Time for a Change RMC, a nonprofit management firm run by building residents. One of Walker’s friends witnessed him open the third-floor elevator-shaft doors …