JACKSONVILLE BEACH, Fla. -- Jacksonville police made a disturbing discovery after arresting a Jacksonville Beach mother on a DUI charge.

Police said the woman was driving with her two children in the back seat, which was covered with trash and cockroaches.

Investigators said 44-year-old Tammie Nava's blood-alcohol count was nearly twice the legal limit for DUI.

Police said more than 100 roaches were crawling all over Nava's Ford Mustang and that amid the trash, open food containers and alcohol bottles was a 1-year-old child and a 3-year-old child.

"They were soaked and covered in urine and their own feces, and there were cockroaches all over the car. The officer says when he reached in to unbuckle the child, three roaches ran across his hand -- they were just everywhere," said Jacksonville Beach police Sgt. Thomas Bingham.

Investigators said the situation was unhealthy and wouldn't have been discovered if Nava had not been visibly drunk and swerving behind the wheel.

According to officers, Nava hit a median and swerved into another lane. The officers said when they approached the car, they the could smell alcohol on the suspect's breath and that she held onto the car door to get out.

After she was arrested, officers saw the two kids in the back seat.

"You can understand if somebody wants to let themselves deteriorate, but when they do this to their children and make their children suffer, that's unexplainable," Bingham said.

Nava's neighbor told Channel 4 that there must be an explanation for Nava's behavior.

"Being a single mom and all she works. She's a nurse. She's pretty responsible. I'm really surprised," the neighbor said.

The children found in the back of the car are in the care of their grandfather.