These are the victims of the shooting at a Northern California veterans home

Golick, who earned a PhD in applied psychology from Akamai University, worked as a therapist for the Pathway program. She specialized in Cognitive Therapy and was well versed in psychodynamic, interpersonal, and family systems theories, according to her LinkedIn page. Her work focused on diverse populations, including the chronically mentally ill and children. On the Yountville veterans home's site, she's listed as the Clinical Director.

Around 10:30 a.m. PT, just after the gunman arrived, Golick called her husband, Mark, to tell him that she had been taken hostage, The Oregonian reported.

Authorities say it's too early to tell whether Wong chose the victims at random. Golick’s father-in-law, Bob Golick, told the AP that she had recently expelled Wong from the Pathway program.

Sources: LinkedIn, The Oregonian, The Associated Press

As a therapist, Gonzales worked with veterans who struggled with depression, anxiety, and/or PTSD. She split up her time between the Pathway program and the Student Veteran Health Program, organized through the San Francisco Department of Veterans Affairs.

Gonzales received her doctorate from Palo Alto University in 2003, when she joined a practice group to work with Santa Clara County sheriff deputies, their families, and civilians.

Source: PsychArmor Institute

Wong was believed to be in his mid-30s and was discharged from the treatment program in February, according to The Napa Valley Register.

"We are deeply saddened and affected by the tragic outcome of the hostage situation at the Veterans Home of California in Yountville and extend our deepest condolences to the loved ones involved," the US Secretary of Veterans Affairs, David Shulkin, said on Twitter.

On social media, people are continuing to call for stricter gun control, a national debate that a massacre at a Florida high school last month reinvigorated. On Saturday, the US Justice Department filed a motion to ban "bump stocks," a modification to high-capacity rifles that allows them to fire ammunition more quickly. And in a departure from the traditional GOP stance, President Donald Trump has also called for comprehensive firearm regulation since the Florida shooting.

Sources: The Napa Valley Register, Twitter