SAN ANTONIO – San Antonio police have arrested a 14-year-old boy in connection with the deaths of a pregnant woman, her baby and her mother, police announced Tuesday.

The shooting occurred April 9 at the Rosemont at University Park Apartments in the 100 block of Emerald Ash. Because the individual arrested is a minor, KSAT is not naming him.

Police said the teen is suspected of fatally shooting Janette Quiroz, 37, and Quiroz's pregnant daughter, Bernadett Quiroz. Janette Quiroz was pronounced dead at the scene while Bernadett Quiroz, 18, was rushed to San Antonio Military Medical Center, where medical professionals were unable to save her but able to deliver the infant.

The baby, named Tabitha Quiroz, survived for three days before dying.

The Quiroz matriarch, Malinda Quiroz, said she made the tough decision to take the child off life support.

“Even though I would have liked for her to be here with us, but unfortunately, I didn’t want her to suffer," Malinda Quiroz said. "So I made that decision. And all I can say is she went with her mom because she was dead by the time they got her to the hospital, too. She was brain dead. So I'm saying she died with her mommy. And the only thing that consoles me is that ‘OK, well this happened. So I have to return her back to her mommy.’”

Police said that the 14-year-old was already in custody at the Juvenile Detention Center on an aggravated robbery charge when he was charged with capital murder.

It's unclear what led up to the shooting or how the teen knew the victims.