A teacher at La Joya Independent School District was arrested Thursday in connection with the death of a 5-year-old boy who was found unresponsive inside a vehicle in the parking lot of an elementary school in August, according to La Joya ISD police Chief Raul Gonzalez.

RELATED: Police: 5-year-old boy died after being found unresponsive inside staff member's vehicle at La Joya ISD elementary school 

Diana Treviño-Montelongo 37, was booked into Hidalgo County jail on a charge of criminal negligent homicide, a state jail felony.

Treviño-Montelongo was released Thursday on a $50,000 bond, records show.

Gonzalez confirmed Treviño-Montelongo was a teacher at Dr. Americo Paredes Elementary School and the aunt of the boy.

RELATED: Preliminary autopsy results show boy left inside vehicle at La Joya ISD school died of heat stroke, justice of the peace says

She's currently on paid administrative leave, according to Gonzalez