This is based on a true story that I knew the investigators working on it and other similar cases. Some use what is mentioned in that link. Others use implants for hearing and vision, or specialty contact lenses, etc.
The boy's father was in the military and entered the mother and son in a study on augmented reality. They took a lump sum payment after first doing an infant development study and the other new study came up. It mimics schizophrenia but a variety of medical tests show it is not consistent with what goes on in real schizophrenia. The boy's mom at one point tries to explain she's a communications officer hearing things from all over and that there is a problem. The problem people catch it, change what she seems to say and the boy kills her.
A similar program to the one in this link that simulates schizophrenia was used on the boy. https://www.technologyreview.com/s/601336/disability-simulating-vr-promotes-empathy/