Mezue ahịrịokwu na-esonụ: Na 2012 Summer Olympics, de Beer bụ akụkụ nke South African otu na
4 x 400 metres relay semifinal, ebe ọ ga-agba ọsọ ikpeazụ. N'agba nke abụọ, Ofentse Mogawane na onye Kenya bụ Vincent Mumo Kiilu kụkasịrị, nke mere ka South Africa pụọ n'ọsọ ahụ. A gafere South Africa n'asọmpi ikpeazụ ahụ mgbe ha rịọrọ ndị IAAF arịrịọ, n'ihi nnyonye anya nke onye egwuregwu Kenya nke meriri Mogawane. E kenyere ha okporo ụzọ nke itoolu. Ọ gbara ọsọ nke abụọ n'asọmpi ikpeazụ nke South Africa gbara onye nke asatọ.