Democratic presidential candidate Hillary Clinton on Monday gained an endorsement from Sybrina Fulton, the mother of the late Trayvon Martin.

Fulton announced her endorsement in an op-ed published on CNN, in which she stated that the former secretary of state was the best candidate to "stand up to inaction from Republicans and indifference from the NRA" on gun control.

"With so many of our children's lives on the line or taken, we simply can't afford to elect a Republican who refuses to even acknowledge the problem of senseless gun violence. The rising generation of our young people need a President who will stand up to inaction from Republicans and indifference from the NRA. I believe that person is Hillary Clinton," wrote Fulton, whose 17-year-old son was killed during a confrontation with former neighborhood watch caption George Zimmerman in 2012. Zimmerman was later acquitted on all charges for shooting the unarmed teen in 2013, sparking ongoing protests throughout the nation.

In the editorial, Fulton explained that her decision to support the former first lady was cemented after they met in person in Chicago last November. At the meeting, Fulton, along with other mothers who lost children at the hands of law enforcement, shared with Clinton their thoughts on criminal justice, gun control and police brutality.

Fulton also stated that she agrees with President Barack Obama, who declared last week that he would only support a presidential candidate who stood in support of certain gun measures.

"Hillary Clinton passes that test," Fulton wrote.

Fulton ended the piece by naming other unarmed black men and boys who were shot down by law enforcement in recent years and calling on their mothers to speak out against injustice by voting.

"Not only am I missing my son, but too many other moms like me are missing their sons -- Eric Garner, Jordan Davis, Laquan McDonald, Freddie Gray, Michael Brown, Oscar Grant, Sean Bell, Tamir Rice. As their mothers, we must do more than just cry. And all of us must do more than speak out, protest and march," she wrote. "We must vote!"