story: She had finally broken it off with John. He'd been controlling and sometimes violent. She heard the sirens before the cop car pulled up. They'd found her ex-boyfriend with a pair of binoculars in a tree. He said he'd only been watching birds.
 selected sentence: They'd found her ex-boyfriend with a pair of binoculars in a tree.
The cops find John >Causes/Enables> The cops arrest John