because crystal taylor wasn't the only one killed by that bullet. >>> coming up, police drill down inhe search for a suspect. >> we tend to focus on relatives or relationship partners. >> the men in crystal's life. one, two, three of them. >> we're trying to find out who would have the motivation to do this. >> when "dateline" continues. we're helping change the future of heart failure. understanding how to talk to your doctor about treatment options is key. today, we are redefining how we do things. we find new ways of speaking, so you're never out of touch. it's seeing someone's face that comforts us, no matter where. when those around us know us, they can show us just how much they care. the first steps of checking in, the smallest moments can end up being everything. there's resources that can inform us, and that spark can make a difference. when we use it to improve things, then that change can last within us. when we understand what's possible, we won't settle for less. the best thing we can be is striving to be at our best. managing heart failure starts now with understanding.