The Forth Worth, Texas, officer who shot and killed Atatiana Jefferson while she was babysitting her nephew was indicted on murder charges, according to NBC News.

A Texas grand jury indicted Aaron Dean, 35, on Friday morning for shooting Jefferson who was a 28-year-old pre-med graduate student. 

Jefferson's family attorney Lee Merritt tweeted on Friday that they were relieved with the indictment but will "remain cautious that a conviction and appropriate sentence is still a long way away."

Tarrant County prosecutors said they had enough evidence to ask the grand jury for an indictment and planned to "prosecute this case to the fullest extent of the law."

Following being arrested days after the shooting, Dean resigned from the Fort Worth Police Department, according to NBC DFW.

"Had the officer not resigned, I would have fired him for violations for several policies, including our use of force policy, our de-escalation policy and unprofessional conduct," Police Chief Ed Kraus told reporters.

On October 12, Dean and another officer were responding to a welfare check at Jefferson's home after a neighbor noticed the front door had been left open. 

The 28-year-old was reportedly playing video games with her 8-year-old nephew when Dean fired a single shot, fatally striking Jefferson, as Blavity previously reported.

According to NBC News, Dean failed to identify himself before firing his gun. 

Jefferson's nephew allegedly told police that she had taken a gun from her purse when she heard noises outside the bedroom. Although an arrest warrant stated she pointed the gun toward the window, police said she was within her rights to protect herself. 

A trial date has not yet been announced.