Two mothers whose children died as babies met with Bexar County District Attorney, Susan Reed, Tuesday in an effort to keep the woman believed to have killed their children in prison.

Genene Jones, a former nurse, was convicted of killing 15-month-old Chelsea McClellan in September 1981 by injecting her with what was supposed to be a routine vaccine at doctor's office in Kerr County.

The substance turned out to be a powerful muscle relaxant.

Baby Chelsea died shortly after.

The child's mother, Petti McClellan-Weise, was one of the women who met with Reed.

"It's a marathon. It's going to be tough," McClellan-Weise said. "But this DA is willing to take the steps to keep this woman in prison."

Jones was sentenced to 99 years for the murder of McClellan-Weise's daughter.

Jones is serving a 60 year sentence simultaneously for a conviction of injury to a child in Bexar County.

But Jones is suspected in more than 40 other child deaths in the county.

One of them is the death of Marina Rodriguez' 6-month-old son, Feliciano, who passed away in May 1980. Rodriguez says she watched Jones inject her son with what was also supposed to be a vaccine.

Rodriguez' son immediately went into cardiac arrest and began turning blue.

Rodriguez was part of the meeting with Reed.

“My mission is for all of us San Antonio moms who didn’t get heard 30 years ago to get heard and keep that monster in prison where she needs to be,” said Rodriguez.

Prosecutors must now dig through decades of evidence to see if another murder conviction is possible, perhaps in the case of Rodriguez’ son, one of many Jones is suspected in that were never prosecuted.

“The reality is one of the nation’s most cold blooded, diabolical serial killers is scheduled to be released sometime in early 2018 depending on her behavior,” said Andy Kahan, a victim’s advocate with the City of Houston.

The two mothers now live in the Houston area and Kahan is working with them to keep Jones locked up.

Jones could be released in 2018 because of a law in place at the time of her conviction that grants her mandatory parole.

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