SAN ANTONIO - The Bexar County District Attorney's Office announced Tuesday that a grand jury has indicted Genene Jones on a new murder charge.

Jones, 66, is now charged with the Sept. 24 murder of 3-month-old Paul Villarreal.

As KENS 5 reported, she was indicted in four child murders earlier this year.

She was already serving a 99-year prison sentence after she was convicted of killing Chelsea McClellan in 1982.

Due to a law in effect at the time Jones was initially sentenced in 1984, she was set to be released from prison in March 2018. However, she will be extradited back to Bexar County to face these new charges against her.

RELATED: D.A. LaHood determined to keep convicted baby murderer behind bars

The accusations against her stem from her time as licensed vocational nurse at Bexar County Hospital, now University Hospital, in the early 1980s.

She is accused of deliberately harming children under her care in the pediatric intensive care unit.

“True justice will come when she stands before the Lord, but until then, we will do our best to make sure Genene Jones takes her last breath from behind prison bars,” said District Attorney Nico LaHood.

The DA's office released the following statement:

"Over the last year, our office announced several indictments against Jones. In June, this office announced the indictments against Jones for the July 3, 1981 murder of 8-month-old Richard “Ricky” Nelson, the Jan. 17, 1982 murder of 4-month-old Patrick Zavala and the Sept. 16, 1981 murder of 2-year-old Rosemary Vega. In May, a Bexar County Grand Jury returned a true bill of indictment against Jones for the 1981 murder of Joshua Sawyer."