Texas authorities are working to learn what drove a mother to attempt to murder her children last month by drugging and drowning them before killing herself.

According to police, 39-year-old Jessica Quintana was arrested and charged with multiple felonies for the murder-suicide plot, according to multiple local news outlets.

The Liberty County District Attorney’s Office said deputies were called to Quintana’s sprawling and isolated rural estate on Sept. 29, where they found Quintana unresponsive in a pond alongside her three children, ages 15, 11 and 6, KHOU reported.

Investigators learned that Quintana intentionally gave her children tequila and NyQuil before entering the water with them.

Only the 11-year-old girl was found unresponsive and in critical condition. The other children we

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