emotional attachment? >> there was no love there. >> but now, of course, police needed to talk to jeffrey wilson. an affair was one thing. but now, wilson found himself caught in the middle of a murder investigation of a higher ranking officer. coming up -- >> joan says, i can't take this anymore, i want to be with you. >> might someone else have wanted david shannon dead? police are about to put more than one suspect under the microscope. when "dateline" continues. claritin-d relieves 8, including sinus congestion and pressure. claritin-d relieves more. happiness is powerful flea and tick protection from nexgard. nexgard kills fleas and ticks all month long. and it comes in an easy-to-give tasty chew.