Keeler wanted the institute to receive bad publicity  He and Greene were the only ones in a position to tell the press about the institute' s potentially embarrassing affiliations, but Greene had no reason to do so
Ttherefore, it must have been Keeler who notified the press
Other than Helms and Lapinski, no one had access to the equipment on Thursday, the day it was tampered with. Thus, since Helms had reason to tamper with the equipment and Lapinski did not, it must have been Helms who did it.