like his friendships. >> my sister was very worried cause she said, "look at bobby fischer.ou that he likes chess?" >> reporter: by his teen years, sally was worried about will, seeing him struggle, unable to connect with his peers. >> it's hard to be a kid when you have the mind of an adult. he was diagnosed with mental illness when he was in college. >> reporter: sally says the only thing worse than her son's illness was the way the world began to treat him. >> there's tremendous stigma. society disregards and discards people with mental illness. he wasn't happy. and soen why, you don't want to see your child suffer, especially suffer when you know that we're still in a situation where the illness that he has is something that the world doesn't care about. >> reporter: will had to leave college, and back home in new york, he was given psychiatric treatment, but sally says eventually those prescribed medications weren't enough. she was fearing the worst. what were you afraid was going to happen? >> i knew he was self-medicating. >> what do you think he was doing with those