SPRING, Texas- Three suspects have been arrested after a 14-year-old with special needs died last year after being given blood pressure medication not prescribed by a doctor, authorities say.

The Montgomery County sheriff's office said Saturday that Tommieretta Gunner, Marreissa Jones and Anthony Jackson were arrested Tuesday for injury to a child. Jones was allegedly a home healthcare provider assigned to take care of the child, and Jackson is the child's father.

MCSO says an investigation found numerous people had used a stun gun on her over several months.

Authorities were called to a Spring home in October 2016 when the teen became unresponsive after being given the medication. She was pronounced dead at a hospital.

An autopsy found the medication caused her death, which was ruled a homicide.

Detectives found that video surveillance in the home captured the stun gun use and administering of the medication.

MCSO is still investigating and asking anyone with information regarding this crime to contact them at 936-760-5800 and refer to case# 16A190412.