Follow CBSDFW.COM: Facebook | Twitter

SAGINAW (CBS11) –  A North Texas mother is frustrated over what she describes as a lack of oversight of her special needs son.

READ MORE: 17-Year-Old Arrested After Man Found Dead At Dallas Park In November

“I’ve been apologized to one too many times,” Patti Keenan of Saginaw says about the response she has received from school officials.

Keenan’s son, 11-year-old Brennan, has Down Syndrome and is a student at High Country Elementary School in the Eagle Mountain-Saginaw ISD.

Keenan’s frustration boiled over Wednesday when Brennan stepped off the school bus and came home without a $17,000 hearing aide for his Cochlear implant.

“This is the third time it’s happened,” says Keenan.  “I keep getting promises that it will never happen again.”

She said like many other young children with Down Syndrome, Brennan was unaware of his actions when he dug into his backpack, found his hearing aide and tossed it out of the window.

According to Keenan, the fact that he managed to do that proves the school bus monitor wasn’t keeping a watchful eye on him.

READ MORE: Russ Martin, Longtime North Texas Radio Personality, Found Dead At Frisco Home

“I don’t have trust, and if I don’t have trust to my child on the bus,” says Keenan.  “I begged Don [her husband] this morning to get him out of school so he didn’t have to ride the bus home.”

The hearing aide was eventually found on the side of the road with the help of some of the staff from the school bus. It had been run over and damaged.

The family says this is the most recent instance where they believe school and bus staff have failed to watch over Brennan. They say they have a variety of complaints about his safety that date back several years.

A spokesperson for the Eagle Mountain-Saginaw ISD released the following statement in regards to the Keenan family’s concern:

“We are committed to ensuring the safety, well-being, and academic development of all our 19,188 students. We look into every concern brought to us and make decisions in the best interest of every child. Our Special Education program is well staffed with highly trained educators. Our self-contained special education classrooms have small class sizes, with an average ratio of 3 teachers and paraprofessionals for every 7 students.

In addition, district special education experts work daily with teachers and students in classrooms across the district. The safety and well-being of all students is paramount in EMS ISD. We believe that education is a team effort and we work to involve parents, staff, and community to create nurturing learning environments where every child can succeed.”

MORE NEWS: ERCOT Shuts Down Wholesale Electricity Provider Griddy In Texas

(©2016 CBS Local Media, a division of CBS Radio Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)