Erica Garner, who became a civil rights activist against police brutality after the death of her father in 2014, has died aged 27.
A video of Eric Garner, in a police chokehold complaining he could not breathe, sparked national protests.
Ms Garner became a prominent member of the Black Lives Matter movement following her father’s death.
She had been in a coma since 23 December after suffering a heart attack triggered by an asthma attack.
Her official twitter account, being run by her family, said she had suffered major brain damage from a lack of oxygen.
Erica the world loves you. I love you. I am glad you came into our lives. May you find the peace in the next life that you deserved while you were here. I will always love you my sister. love you — officialERICA GARNER (@es_snipes) December 30, 2017
Erica the world loves you. I love you. I am glad you came into our lives. May you find the peace in the next life that you deserved while you were here. I will always love you my sister. love you
— officialERICA GARNER (@es_snipes) December 30, 2017
“When you report this you remember she was human: mother, daughter, sister, aunt. Her heart was bigger than the world. It really really was,” a tweet posted to her account said.
“She cared when most people wouldn’t have. She was good. She only pursued right, no matter what. No one gave her justice.”