LOS ANGELES (AP) — The wife of the only American killed in last week's Barcelona attack says she's trying to find a waiter who may have been be the last person to see her husband alive. Heidi Nunes-Tucker of the San Francisco Bay Area said Tuesday that a photo or video posted on social media shortly after the attack shows the waiter trying to help her gravely injured husband, 42-year-old Jared Tucker. She doesn't have a copy of the post but says she and her family want to find and thank the waiter. She says anyone who stopped to help amid the chaos "is a testament to the helpfulness and love" that strangers can show for each other. Nunes-Tucker is in Barcelona as her husband's body is being prepared for her to take home.