That's the most likely possibility. Apparently, St. Louis is awash with teenaged boys waving guns around. It could have been anyone. 
@mountaineer St.Louis has ALWAYS been awash with men,women,and children carrying guns. Back in my drinking and wandering around the country days I once became instantly sober at around 2 AM one Sunday morning,and discovered that I seemed to be the only white men in East St.Louis. It was like Mogadishu,but without the charm. Trashcan fires and black men,women,and children of all ages wandering up and down the street with all of them giving me the "fisheye",and there I was by myself with only a six shot revolver and no reloads. It was almost enough to make me stop drinking.
My best guess is the only thing that saved me is they all thought it might be a police sting,and I was the white bait. I could literally FEEL the hatred coming off those stares.
To this day I have no idea why I was there. The only two friends I ever had from St.Louis were both KIA in VN,so I wasn't visiting anyone I knew. I can tell you it didn't take me long to get the hell out of there,though.