Amber Carr, the sister of Atatiana Jefferson, the Texas woman fatally shot in her home by a police officer, lost her longtime battle with congestive heart failure. She was 33.

The family’s attorney, Lee Merritt, announced her death on Monday (Jan. 31). Merritt said she “passed away peacefully” and “surrounded by family and loved ones.” Carr leaves behind two young sons.

As she fought illness, Carr, who pursued justice for her sister, attended part of Jefferson’s December murder trial in a wheelchair before being readmitted to the hospital, local station KXAS reported.

Carr’s son, Zion, 8 at the time of the shooting, was the only person home with Jefferson when former Fort Worth officer Aaron Dean, who is white, fatally shot his aunt in the family’s home on Oct. 12, 2019. While responding to a non-emergency call about an open door at the house, Dean walked into the backyard and claimed that he saw a silhouette of a person and the barrel of a gun. He fired through a bedroom window, fatally wounding Jefferson.

On Dec. 15, a Tarrant County jury found him guilty of manslaughter after more than 13 hours of deliberation. Five days later, the jurors sentenced him to serve 11 years and 10 months in prison.

Carr’s passing is the latest in a series of heartbreaking deaths for the family. After Jefferson was killed, Jefferson’s father, Marquis Jefferson, died two weeks after her funeral. Jefferson’s mother, Yolanda Carr, died just a few weeks later.

The onset of Carr’s health complications came after Jefferson’s death, according to local station WFAA. “The hardest part about all of this, for me and for the family, is dealing with the children who are growing up and experiencing trauma after trauma,” Merritt told WFAA last month.

A GoFundMe campaign, set up before Carr’s death, raised more than $132,000 by Feb. 1.

“Atatiana Jefferson’s family has been through enough. Let’s show all the support we can as Amber fights to recover,” the site says.