CNN  — 

A Texas grand jury has indicted a former Fort Worth police officer who two months ago fired through the window of a home, killing Atatiana Jefferson.

Early on October 12, Jefferson, 28, was playing video games with her nephew when Officer Aaron Dean and another officer arrived at her home.

A concerned neighbor had called the non-emergency police number after noticing the home’s exterior doors were open at that late hour. As officers walked around the house in the dark, Jefferson heard a noise in the back yard, pulled out a gun from her purse and pointed it at the window, police said.

Dean yelled “Put your hands up! Show me your hands!” before he fired through the window, killing her, body camera footage showed. Neither of the officers identified themselves as police.

Attorney S. Lee Merritt, who represents the Jefferson family, tweeted: “Atatiana’s family is (relieved) but remain cautious that a conviction and appropriate sentence is still a long way away. Keep pushing.”

“My God, I was so happy to know that the man that shot and killed my daughter is going to be indicted for murder,” said Yolanda Carr, Jefferson’s mother. Jefferson had just moved back to the home to care for her.

“Justice was served on that part, but I know we got a long way to go,” she said through tears. “I’m so glad that they finally indicted that man on murder because he murdered my baby.”

Dean, 34, resigned from the force and was charged with murder, the charge on which he was indicted.

Dean’s attorney, Jim Lane, told CNN in October the former officer is remorseful.

“My client is sorry, and his family is in shock,” Lane said at the time.

In the days following the shooting, the former officer declined to speak with investigators, an October arrest warrant states, and his attorneys had told police he’d provide a written statement at a later date.

After the shooting, the neighbor who asked for a wellness check told CNN affiliate KTVT he felt “guilty’ for calling the police because “had I not called the Fort Worth Police Department, my neighbor would still be alive today.”

Jefferson graduated from Louisiana’s Xavier University in 2014 with a degree in biology and worked in pharmaceutical equipment sales.

CNN’s Brad Parks, Sheena Jones and Hollie Silverman contributed to this report.