Paramedics who were also summoned to the scene attempted to perform CPR on the infant, but to no avail. Zayla was then rushed to a hospital in Azle, where she was pronounced dead.
An autopsy later determined the eight-month-old died as a result of drowning.
When questioned by deputies, Stuckey reportedly said that after running a bath for Zayla, she became 'distracted' by another child and then went on Facebook Messenger, with a television playing loudly in the background.
An investigation has found that the 21-year-old woman had been on Facebook Messenger with two people for at least 18 minutes while her daughter was alone in the tub, according to the sheriff's office.
In the wake of baby Zayla's death, Stuckey's three surviving children, including her four-year-old twins and 2-year-old son, have been removed from her care and placed in a foster home.
A GoFundMe campaign has been launched to help the family pay Zayla's final expenses. As of Thursday afternoon, $125 has been raised.