the murderer then got the cleaning equipment out of philips desk , cleaned the rifle , put it back where hed found ithaving wiped it clean of fingerprints , stored the cleaning equipment , wrapped up the disposable cleaning supplies , rags and suchpicked up philips door pass , exited the building , dumped the soiled cleaning supplies into the picnic area trash can , used the door pass to return to the scene of the crime at 5:07 , returned the pass to the desk as if philip had dropped it thereas he might have doneand having checked the scene one last time , left .