Mexican police investigating murder of American tourist

(CBS) -- "I want everyone to remember Tatiana for her smile, her liveliness, her optimism and adventurous spirit," says Tatiana Mirutenko's sister, Roma.

She and their father say Tatiana and her husband were in Mexico City to celebrate their first anniversary.

"A year ago at this time, we were selecting flowers for her wedding, and yesterday, we were there selecting flowers for her funeral," says her father, Wasyl Mirutenko.

The couple was traveling with other friends to sample Mexico City's best restaurants. Mirutenko was shot at a taqueria in an upscale neighborhood over the weekend. Police say the gunmen were aiming for a bouncer inside the restaurant but hit Mirutenko as she was leaving. Her family says she had just told them how safe she felt there.

"We've traveled to Mexico all of our lives. Tania has probably been there at least 30 times."

According to the latest figures from the Mexican Government, 2017 was the nation's deadliest year on record with more than 25,000 murders. Earlier this year, the U.S. State Department issued a travel ban to 5 Mexican states--the same warning issued to war-torn countries like Syria, Afghanistan and Somalia. Popular tourist destinations Ixtapa and Acapulco are in those "do not travel" zones. The government also warns tourists to "exercise increased caution" when visiting Cancun, Cozumel, Playa del Carmen and Mexico City.

Tatiana was an investor relations analyst for a San Francisco pharmaceutical firm. She was also a role model to her younger sister, Roma.

"To me, she is who I aspire to be as a person, with everything I do, and I don't know what I'll do without her," Roma says.

Mirutenko's funeral will be held Saturday in Chicago, where she grew up. Police in Mexico say they are reviewing surveillance video as they search for the gunmen.