Wife of Lafayette man killed in Barcelona seeks last person who saw him

LAFAYETTE, Calif. -- 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.

Lafayette resident Heidi Nunes-Tucker 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.

VIDEO: Family: Bay Area man is victim of Barcelona attack

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.

PHOTOS: Images from scene of struck pedestrians in Barcelona

Nunes-Tucker is in Barcelona as her husband's body is being prepared for her to take home.

A GoFundMe page has been created for the family of the victim. Click here if you'd like to help.

ABC7 News contributed to this story.