Erica Garner, who became outspoken activist after her dad was police chokehold victim, has died

She became a well-known activist against police abuse after her dad's death.

Garner, 27, had been hospitalized following a heart attack on Dec. 24.

She "suffered major brain damage from a lack of oxygen while in cardiac arrest," a family member wrote on Erica Garner's verified Twitter page on Wednesday. "Please continue to pray hard for Erica and pray for her family and kids just as much."

Her father's final words, "I can't breathe," were captured on cellphone video and became a rallying cry for protesters against police brutality.