Her family says Mayra Ospina was taken off life support around 10 a.m.
Monday, the 23-year-old was one of four people struck by an accused drunk driver as they were trying to help another driver whose car had gone into a ditch in northwest Harris County.
READ MORE: Victim left brain dead after DWI crash in NW Harris County
Ospina was taken in critical condition to Ben Taub Hospital, where she was declared brain dead Wednesday.
"She looks like she's asleep," her grieving brother, Eric said Thursday. "We just want her to wake up."
Zachary Castro was initially charged with three counts of intoxication assault. Now, one of those charges has increased to intoxication manslaughter.
READ MORE: Driver accused of crash that left victim brain-dead makes bond
"It didn't surprise us that she was trying to help someone," said Eric. "But driving drunk is a mistake this guy made on purpose. He knew what he was doing and did it."
In addition to the work underway by the district attorney's Vehicular Crimes Division, the family has also hired their own attorney.
For 4 days, Mayra Ospina’s family hasn’t left the hospital where she was taken after being struck by an alleged drunk driver. She was declared brain dead yesterday... #abc13 pic.twitter.com/0mF5cZKQDz— Deborah Wrigley (@wrigleyABC13) January 30, 2020
Carlos Mejias said he will be investigating where Castro bought the alcohol, whether it was from a car, store or another person.
"We just want one more day to say goodbye. We're talking to her and holding her hand," said her brother.
The video above is from a previous story.