Yes there is: http://www.usada.org/max-holt-…ti-doping-rule-violation/
Basically him and Markin are the same case: meldonium being found, but the possibility of having taken it when it still was legal. So I don't find it fair to ban Markin but not Holt because Markin is Russian and Holt is not. Yes, it is state-organised doping and all that, and Holt didn't know what he took, but maybe neither did Markin.
if it's a widespread state administered doping, it's hard to imagine native russian athletes in the system are not aware of it.
markin may be innocent but he's clearly collateral damage in this case.