Heidi Nunes-Tucker of Lafayette lost her husband, 42-year-old Jared Tucker in last week's terror attack in Barcelona. Now she's searching for a waiter spotted helping him in pictures posted to social media.

CBS 5 reports that Nunes-Tucker remains in Barcelona, after identifying the body of her husband last week. If you'll recall, the couple was celebrating their one-year wedding anniversary with Tucker's first trip to Europe and were shopping in a bustling part of Barcelona when a terrorist rammed a van into a crowd of hundreds.

The Tuckers became separated in the chaos so it wasn't until a day later that Nunes-Tucker learned for certain that her husband had died. Tucker was the only American citizen killed in the attack.

Tucker's father, Dan Tucker, told CBS 5 of a video the family spotted on social media. “He (Jared) had some blood on the side of his head and on his arm, but there was a person kneeling with him so we were encouraged to think it was an injury and not anything serious. But he wasn’t moving,” explained Tucker.

The family hopes to find the man, whom they believe to be a waiter, and thank him. Nunes-Tucker remains in Barcelona while Tucker's body is prepared for a return to the Bay Area.

Related: Bay Area Man Confirmed Among Dead In Barcelona Terrorist Attack

This teacher is searching for her missing husband, Jared Tucker, following the van attack in #Barcelona https://t.co/JLJrn8VR59 pic.twitter.com/YrvaAfOKbT

— The Telegraph (@Telegraph) August 18, 2017

Early reports indicate that a Bay Area man is among the dead in Thursday's terror attack in Barcelona in which a man, reportedly an ISIS terrorist, drove a van into a crowded shopping district in the early evening.

The San Francisco Chronicle tells us that 42-year-old Lafayette resident Jared Tucker was vacationing in Spain with his wife Heidi Nunes-Tucker in celebration of the couple's one-year wedding anniversary. Just before the attack, Tucker left his wife to go find a restroom while Nunes-Tucker continued shopping. The pair became separated in the chaos and when she couldn't find her husband, Nunes-Tucker went from hospital to hospital trying to locate him.

While desperately searching for her husband, Nunes-Tucker told NBC News about her experience during the attack. "Next thing I know there's screaming, yelling. I got pushed inside the souvenir kiosk and stayed there hiding while everybody kept running by screaming, and then the police eventually made us evacuate," she explained.

On Friday she was called to identify his body, though some news outlets still claim Tucker is among the missing. Others say he was 43-years-old and/or living in Walnut Creek. The US State Department will only confirm that one American was killed in the attack and another American was injured.

Tucker's nephew Paul Luke offered details on a Reddit thread (according the the Gate), saying "My mother is boarding a flight tonight to be with (Tucker's) wife tomorrow... Jared's burial wishes were to be cremated, but that cannot be done until the investigations have finished. My mother and his wife will be in Barcelona for an undetermined amount of time until final arrangements can be made."

In the Reddit thread, Luke posted photos of his uncle before the attack in a blue shirt and khaki shorts, along with photos after the attack of a man in the same outfit lying bloodied in the street.

According to KRON 4, Nunez-Tucker didn't know her husband was dead until agents from the FBI showed her pictures of the victims. KRON also has an interview with Tucker's dad, with whom he owned a pool business based out of Martinez. "It's hard to understand," he said.

"To everyone who helped call, translate, find phone numbers, and physically visit hospitals I am grateful. Amidst terrible sadness, the people of Barcelona came out in droves to help us," said Luke.

At least 13 people died in the attack that injured at least 100. The incident occurred at around 5 p.m. local time Thursday when a van, allegedly driven by a member or supporter of ISIS, drove onto a promenade in central Barcelona and plowed into hundreds of people. Here're the basics from CNN.

You may recall that Barcelona is a sister-city to San Francisco.

Related: In Wake Of Istanbul Terror Attack, SFO Announces Heightened Security

San Francisco gave a proper shout-out to the inarguably wonderful Catalan people today (full disclosure: your editor's family hails from the area) after signing a sisters-cities pact with Barcelona, Spain. Spearheaded by Sister Cities International, a nonprofit "designed to strengthen partnerships between U.S. communities and those abroad," Mayor Gavin Newsom made it official on Monday. Sister Cities International strives to "build global cooperation at the municipal level, promote cultural understanding and stimulate economic development."

San Francisco has 18 sisters cities, including Amman, Jordan; Abidjan, Côte d'Ivoire (Ivory Coast); Assisi, Italy; Bangalore, India; Caracas, Venezuela; Cork, Ireland; Haifa, Israel; Ho Chi Minh City, Vietnam; Krakow, Poland; Manila, Philippines; Osaka, Japan; Seoul, South Korea; Shanghai, China; Sydney, Australia; Taipei, China Taiwan; Thessaloniki, Greece; and Zürich, Switzerland.