An emotional ad narrated by Eric Garner's daughter is boosting Sen. Bernie Sanders' challenge to Hillary Clinton for the Democratic presidential nomination.

In the four-minute video, uploaded to YouTube Thursday, Erica Garner explains her life after her father's death at the hands of New York City police officers in 2014 and why she supports Sanders.

"No one gets to see their parents' last moments. And I was able to see my dad die on national TV," Garner says as pictures of her father and her daughter appear. "They don't know what they took from us. He wasn't just someone that no one cared for him or no one loved him. He was loved dearly."

Eric Garner, 43, died after officers who suspected he was illegally selling cigarettes on a Staten Island street forcibly restrained him. Officer Daniel Pantaleo used a chokehold, which the department's rules prohibit, to subdue Garner. A local grand jury declined to indict Pantaleo.

Garner's final words, "I can't breath," became a rallying cry for protestors in New York and around the country faulting police violence against black suspects.

Sanders' ad comes as Sanders and Clinton vie for support from African-American voters in South Carolina, which holds its Democratic primary on Feb. 27, and in other primary states where black voters make up a large percentage of the Democratic electorate.

Polls have shown Clinton receiving support from more than 80 percent of African-Americans in South Carolina, helping her maintain a sizable lead over Sanders in the state. Clinton is touting support from members of the Congressional Black Caucus in the state.

But Erica Garner, who endorsed Sanders last month, highlights a generational divide in South Carolina and elsewhere, with Sanders faring better among younger voters of all races. Garner, who describes regularly participating in protests over her father's death, says Sanders is with her.

"I think we need to believe in a leader like Bernie Sanders," Garner says in the video. "There's no other person that's speaking about this. People are dying. This is real. This is not TV. We need a president that will talk about it. I believe Bernie Sanders is a protester. He's not scared to go up against the criminal justice system. He's not scared."