The mother of an 8-year-old Orange County boy who was allegedly beaten to death by his 13-year-old brother was arrested Thursday on aggravated child neglect charges.

Tangela Key, 34, was arrested in connection to the death of her son, Levares Key, who died over the weekend.

Demetrius Key was charged with first-degree murder in Levares' death on Wednesday.

Investigators said Demetrius admitted to beating, kicking, choking and repeatedly banging Levares' head against the floor while baby-sitting him and other siblings because Levares ate a dessert he was not supposed to and picked a scab until it bled.

Tangela Key was charged because she left Lavares with Demetrius and knew that Demetrius was capable of inflicting harm upon his brother, investigators said.

Lavares was beaten numerous times prior to his death, according to investigators.

"We have also learned that (Tangela Key) participated in -- and actually directed her other children to participate in -- discipline sessions with Lavares where Demetrius would hold Lavares' legs and another sibling would hold his arms and she would beat him while the other two children held him," Orange County Sheriff's Sgt. John Allen said.

Investigators told Local 6 News that more charges will likely be filed against Tangela Key.

Watch Local 6 News for more on this story.