I have no evidence to support my claim but just from observation I believe a large majority of US sprinters use steroids. I find it hard to believe how sprinters such as Gatlin, Crawford, and more recently Leonard Scott, Walter Dix and Wallace Spearmon have very big dramatic improvement in their times over a very short period of time. I am not saying guys like Gatlin and Crawford not talented but being around college athletes who take steroids makes me wonder how if these stars are "clean".
I wish Brown, Burns , Candice Scott and others the very best. It is very tough being involved in track and field especially coming from Trinidad. Hopefully, their futures will be blessed with lots of success.