Does my friend qualify for any form of disability or financial aid?

[Jon Jon]

Ok, my buddy was a very active and ambitious person (star football player in highschool, extremely bright, etc) but when he was 17 he had a life changing event (I'd rather not say what it is) that caused him to go into a deep depression and with that, he started to get a lot of anxiety (including OCD). He has held some part time jobs before and after, but he really can't hold them down since he is soo depressed. He tried therapy and medication for about 6 years, and nothing really worked for him, so he basically is non-functional at this moment. He needs money, but never really was someone that asked for help and always worked for everything he earned. He is now in his late twenties and is getting financial help from his parents, would he qualify for any disability or aid from the government due to his psychological status (even though he never has had a real job)? He lives in Missouri